diff --git a/scripts/lv_conf_internal_gen.py b/scripts/lv_conf_internal_gen.py
index 3801a07e5..44e2079a2 100755
--- a/scripts/lv_conf_internal_gen.py
+++ b/scripts/lv_conf_internal_gen.py
@@ -57,6 +57,11 @@ fout.write(
     #else
         #include "../../lv_conf.h"                /*Else assume lv_conf.h is next to the lvgl folder*/
     #endif
+    #if !defined(LV_CONF_H) && !defined(LV_CONF_SUPPRESS_DEFINE_CHECK)
+        /* #include will sometimes silently fail when __has_include is used */
+        /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80753 */
+        #pragma message("Possible failure to include lv_conf.h, please read the comment in this file if you get errors")
+    #endif
 #endif
 
 #ifdef CONFIG_LV_COLOR_DEPTH
diff --git a/src/lv_conf_internal.h b/src/lv_conf_internal.h
index d7321ad26..456c72844 100644
--- a/src/lv_conf_internal.h
+++ b/src/lv_conf_internal.h
@@ -40,6 +40,11 @@
     #else
         #include "../../lv_conf.h"                /*Else assume lv_conf.h is next to the lvgl folder*/
     #endif
+    #if !defined(LV_CONF_H) && !defined(LV_CONF_SUPPRESS_DEFINE_CHECK)
+        /* #include will sometimes silently fail when __has_include is used */
+        /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80753 */
+        #pragma message("Possible failure to include lv_conf.h, please read the comment in this file if you get errors")
+    #endif
 #endif
 
 #ifdef CONFIG_LV_COLOR_DEPTH
diff --git a/tests/src/lv_test_conf.h b/tests/src/lv_test_conf.h
index a1e855705..7d28ef609 100644
--- a/tests/src/lv_test_conf.h
+++ b/tests/src/lv_test_conf.h
@@ -6,6 +6,8 @@
 #ifndef LV_TEST_CONF_H
 #define LV_TEST_CONF_H
 
+#define LV_CONF_SUPPRESS_DEFINE_CHECK 1
+
 #ifdef __cplusplus
 extern "C" {
 #endif