diff --git a/backend/libinput/events.c b/backend/libinput/events.c
index 5f5fb08a..85724c90 100644
--- a/backend/libinput/events.c
+++ b/backend/libinput/events.c
@@ -174,12 +174,12 @@ void handle_libinput_event(struct wlr_libinput_backend *backend,
 		handle_pointer_button(event, &dev->pointer);
 		break;
 	case LIBINPUT_EVENT_POINTER_AXIS:
-#if !LIBINPUT_HAS_SCROLL_VALUE120
+#if !HAVE_LIBINPUT_SCROLL_VALUE120
 		/* This event must be ignored in favour of the SCROLL_* events */
 		handle_pointer_axis(event, &dev->pointer);
 #endif
 		break;
-#if LIBINPUT_HAS_SCROLL_VALUE120
+#if HAVE_LIBINPUT_SCROLL_VALUE120
 	case LIBINPUT_EVENT_POINTER_SCROLL_WHEEL:
 		handle_pointer_axis_value120(event, &dev->pointer,
 			WLR_AXIS_SOURCE_WHEEL);
@@ -250,7 +250,7 @@ void handle_libinput_event(struct wlr_libinput_backend *backend,
 	case LIBINPUT_EVENT_GESTURE_PINCH_END:
 		handle_pointer_pinch_end(event, &dev->pointer);
 		break;
-#if LIBINPUT_HAS_HOLD_GESTURES
+#if HAVE_LIBINPUT_HOLD_GESTURES
 	case LIBINPUT_EVENT_GESTURE_HOLD_BEGIN:
 		handle_pointer_hold_begin(event, &dev->pointer);
 		break;
diff --git a/backend/libinput/meson.build b/backend/libinput/meson.build
index 368ae0f9..f4592891 100644
--- a/backend/libinput/meson.build
+++ b/backend/libinput/meson.build
@@ -29,5 +29,5 @@ features += { 'libinput-backend': true }
 wlr_deps += libinput
 
 # libinput hold gestures and high resolution scroll are available since 1.19.0
-internal_config.set10('LIBINPUT_HAS_HOLD_GESTURES', libinput.version().version_compare('>=1.19.0'))
-internal_config.set10('LIBINPUT_HAS_SCROLL_VALUE120', libinput.version().version_compare('>=1.19.0'))
+internal_config.set10('HAVE_LIBINPUT_HOLD_GESTURES', libinput.version().version_compare('>=1.19.0'))
+internal_config.set10('HAVE_LIBINPUT_SCROLL_VALUE120', libinput.version().version_compare('>=1.19.0'))
diff --git a/backend/libinput/pointer.c b/backend/libinput/pointer.c
index 48f8ae12..a1d5ff9f 100644
--- a/backend/libinput/pointer.c
+++ b/backend/libinput/pointer.c
@@ -124,7 +124,7 @@ void handle_pointer_axis(struct libinput_event *event,
 	wl_signal_emit_mutable(&pointer->events.frame, pointer);
 }
 
-#if LIBINPUT_HAS_SCROLL_VALUE120
+#if HAVE_LIBINPUT_SCROLL_VALUE120
 void handle_pointer_axis_value120(struct libinput_event *event,
 		struct wlr_pointer *pointer, enum wlr_axis_source source) {
 	struct libinput_event_pointer *pevent =
diff --git a/backend/x11/backend.c b/backend/x11/backend.c
index 1bb94410..df761898 100644
--- a/backend/x11/backend.c
+++ b/backend/x11/backend.c
@@ -198,7 +198,7 @@ static void backend_destroy(struct wlr_backend *backend) {
 	wlr_drm_format_set_finish(&x11->dri3_formats);
 	wlr_drm_format_set_finish(&x11->shm_formats);
 
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	xcb_errors_context_free(x11->errors_context);
 #endif
 
@@ -629,7 +629,7 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
 			shm_format->format, DRM_FORMAT_MOD_INVALID);
 	}
 
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	if (xcb_errors_context_new(x11->xcb, &x11->errors_context) != 0) {
 		wlr_log(WLR_ERROR, "Failed to create error context");
 		return false;
@@ -673,7 +673,7 @@ error_x11:
 }
 
 static void handle_x11_error(struct wlr_x11_backend *x11, xcb_value_error_t *ev) {
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	const char *major_name = xcb_errors_get_name_for_major_code(
 		x11->errors_context, ev->major_opcode);
 	if (!major_name) {
@@ -711,7 +711,7 @@ log_raw:
 
 static void handle_x11_unknown_event(struct wlr_x11_backend *x11,
 		xcb_generic_event_t *ev) {
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	const char *extension;
 	const char *event_name = xcb_errors_get_name_for_xcb_event(
 		x11->errors_context, ev, &extension);
diff --git a/include/backend/libinput.h b/include/backend/libinput.h
index 36c4794b..d469eb7c 100644
--- a/include/backend/libinput.h
+++ b/include/backend/libinput.h
@@ -72,7 +72,7 @@ void handle_pointer_button(struct libinput_event *event,
 	struct wlr_pointer *pointer);
 void handle_pointer_axis(struct libinput_event *event,
 	struct wlr_pointer *pointer);
-#if LIBINPUT_HAS_SCROLL_VALUE120
+#if HAVE_LIBINPUT_SCROLL_VALUE120
 void handle_pointer_axis_value120(struct libinput_event *event,
 	struct wlr_pointer *pointer, enum wlr_axis_source source);
 #endif
diff --git a/include/backend/x11.h b/include/backend/x11.h
index 704d48f1..f66fed2a 100644
--- a/include/backend/x11.h
+++ b/include/backend/x11.h
@@ -19,7 +19,7 @@
 
 #include "config.h"
 
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 #include <xcb/xcb_errors.h>
 #endif
 
@@ -99,7 +99,7 @@ struct wlr_x11_backend {
 	// The time we last received an event
 	xcb_timestamp_t time;
 
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	xcb_errors_context_t *errors_context;
 #endif
 
diff --git a/include/meson.build b/include/meson.build
index f97e76ac..e6698003 100644
--- a/include/meson.build
+++ b/include/meson.build
@@ -30,7 +30,7 @@ install_subdir('wlr',
 )
 
 foreach name, have : internal_features
-	internal_config.set10('HAS_' + name.underscorify().to_upper(), have)
+	internal_config.set10('HAVE_' + name.underscorify().to_upper(), have)
 endforeach
 wlr_files += configure_file(
 	output: 'config.h',
diff --git a/include/xwayland/xwm.h b/include/xwayland/xwm.h
index 7ed97b15..c057e1b7 100644
--- a/include/xwayland/xwm.h
+++ b/include/xwayland/xwm.h
@@ -8,7 +8,7 @@
 #include "config.h"
 #include "xwayland/selection.h"
 
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 #include <xcb/xcb_errors.h>
 #endif
 
@@ -126,7 +126,7 @@ struct wlr_xwm {
 	const xcb_query_extension_reply_t *xfixes;
 	const xcb_query_extension_reply_t *xres;
 	uint32_t xfixes_major_version;
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	xcb_errors_context_t *errors_context;
 #endif
 	unsigned int last_focus_seq;
diff --git a/render/allocator/gbm.c b/render/allocator/gbm.c
index a41065b5..149ff6b9 100644
--- a/render/allocator/gbm.c
+++ b/render/allocator/gbm.c
@@ -41,7 +41,7 @@ static bool export_gbm_bo(struct gbm_bo *bo,
 	int i;
 	int32_t handle = -1;
 	for (i = 0; i < attribs.n_planes; ++i) {
-#if HAS_GBM_BO_GET_FD_FOR_PLANE
+#if HAVE_GBM_BO_GET_FD_FOR_PLANE
 		(void)handle;
 
 		attribs.fd[i] = gbm_bo_get_fd_for_plane(bo, i);
diff --git a/render/allocator/meson.build b/render/allocator/meson.build
index 1fdfe557..730a2a41 100644
--- a/render/allocator/meson.build
+++ b/render/allocator/meson.build
@@ -21,5 +21,5 @@ if gbm.found()
 	features += { 'gbm-allocator': true }
 
 	has = cc.has_function('gbm_bo_get_fd_for_plane', dependencies: [gbm])
-	internal_config.set10('HAS_GBM_BO_GET_FD_FOR_PLANE', has)
+	internal_config.set10('HAVE_GBM_BO_GET_FD_FOR_PLANE', has)
 endif
diff --git a/xwayland/xwm.c b/xwayland/xwm.c
index 9dcc0da6..61d29f91 100644
--- a/xwayland/xwm.c
+++ b/xwayland/xwm.c
@@ -1534,7 +1534,7 @@ static void xwm_handle_focus_in(struct wlr_xwm *xwm,
 }
 
 static void xwm_handle_xcb_error(struct wlr_xwm *xwm, xcb_value_error_t *ev) {
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	const char *major_name =
 		xcb_errors_get_name_for_major_code(xwm->errors_context,
 			ev->major_opcode);
@@ -1572,7 +1572,7 @@ log_raw:
 }
 
 static void xwm_handle_unhandled_event(struct wlr_xwm *xwm, xcb_generic_event_t *ev) {
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	const char *extension;
 	const char *event_name =
 		xcb_errors_get_name_for_xcb_event(xwm->errors_context,
@@ -1797,7 +1797,7 @@ void xwm_destroy(struct wlr_xwm *xwm) {
 	if (xwm->event_source) {
 		wl_event_source_remove(xwm->event_source);
 	}
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	if (xwm->errors_context) {
 		xcb_errors_context_free(xwm->errors_context);
 	}
@@ -2072,7 +2072,7 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *xwayland, int wm_fd) {
 		return NULL;
 	}
 
-#if HAS_XCB_ERRORS
+#if HAVE_XCB_ERRORS
 	if (xcb_errors_context_new(xwm->xcb_conn, &xwm->errors_context)) {
 		wlr_log(WLR_ERROR, "Could not allocate error context");
 		xwm_destroy(xwm);