diff --git a/common/inc/gx_api.h b/common/inc/gx_api.h
index 7e3e4e94..e78d1e91 100644
--- a/common/inc/gx_api.h
+++ b/common/inc/gx_api.h
@@ -132,6 +132,10 @@ typedef struct GX_STRING_STRUCT
 
 #ifndef GX_DISABLE_DEPRECATED_STRING_API
 #define GX_ENABLE_DEPRECATED_STRING_API
+#pragma message("GUIX deprecated string API is enabled. The pre-5.6 char* string " \
+                "functions do not carry a length and are unsafe with non-NUL-terminated " \
+                "buffers. Define GX_DISABLE_DEPRECATED_STRING_API and migrate to the " \
+                "GX_STRING-based (_ext) variants.")
 #endif
 
 #if defined(GX_THREADX_BINDING)