diff --git a/include/wlr/types/wlr_single_pixel_buffer_v1.h b/include/wlr/types/wlr_single_pixel_buffer_v1.h
index 3eba546a..747d2a6b 100644
--- a/include/wlr/types/wlr_single_pixel_buffer_v1.h
+++ b/include/wlr/types/wlr_single_pixel_buffer_v1.h
@@ -6,8 +6,8 @@
 #error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
 #endif
 
-#ifndef WLR_TYPES_WLR_SINGLE_PIXEL_BUFFER_V1
-#define WLR_TYPES_WLR_SINGLE_PIXEL_BUFFER_V1
+#ifndef WLR_TYPES_WLR_SINGLE_PIXEL_BUFFER_V1_H
+#define WLR_TYPES_WLR_SINGLE_PIXEL_BUFFER_V1_H
 
 #include <wayland-server-core.h>