diff --git a/src/screencast/wlr_screencast.c b/src/screencast/wlr_screencast.c
index cf4167f..3b324a9 100644
--- a/src/screencast/wlr_screencast.c
+++ b/src/screencast/wlr_screencast.c
@@ -20,9 +20,14 @@
 #include "logger.h"
 
 static void wlr_frame_buffer_destroy(struct xdpw_screencast_instance *cast) {
-	munmap(cast->simple_frame.data, cast->simple_frame.size);
-	cast->simple_frame.data = NULL;
-	// wl_buffer_destroy won't work on NULL
+	// Even though this check may be deemed unnecessary,
+	// this has been found to cause SEGFAULTs, like this one: 
+	// https://github.com/emersion/xdg-desktop-portal-wlr/issues/50
+	if (cast->simple_frame.data != NULL) {
+		munmap(cast->simple_frame.data, cast->simple_frame.size);
+		cast->simple_frame.data = NULL;
+	}
+	
 	if (cast->simple_frame.buffer != NULL) {
 		wl_buffer_destroy(cast->simple_frame.buffer);
 		cast->simple_frame.buffer = NULL;