diff --git a/rdtk/include/rdtk/rdtk.h b/rdtk/include/rdtk/rdtk.h
index 4897ff9e3..7932d26e9 100644
--- a/rdtk/include/rdtk/rdtk.h
+++ b/rdtk/include/rdtk/rdtk.h
@@ -44,6 +44,7 @@ extern "C"
 	RDTK_EXPORT void rdtk_engine_free(rdtkEngine* engine);
 
 	WINPR_ATTR_MALLOC(rdtk_engine_free, 1)
+	WINPR_ATTR_NODISCARD
 	RDTK_EXPORT rdtkEngine* rdtk_engine_new(void);
 
 	/* Surface */
diff --git a/rdtk/librdtk/rdtk_font.c b/rdtk/librdtk/rdtk_font.c
index 52fb277cd..bdbe76e49 100644
--- a/rdtk/librdtk/rdtk_font.c
+++ b/rdtk/librdtk/rdtk_font.c
@@ -148,6 +148,7 @@ int rdtk_font_text_draw_size(rdtkFont* font, uint16_t* width, uint16_t* height,
 }
 
 WINPR_ATTR_MALLOC(free, 1)
+WINPR_ATTR_NODISCARD
 static char* rdtk_font_load_descriptor_file(const char* filename, size_t* pSize)
 {
 	WINPR_ASSERT(filename);