diff --git a/src/gdisp/gdisp.c b/src/gdisp/gdisp.c
index e9ede8ab..b8b4a847 100644
--- a/src/gdisp/gdisp.c
+++ b/src/gdisp/gdisp.c
@@ -21,7 +21,11 @@
 
 #if 1
 	#undef INLINE
-	#define INLINE	inline
+	#if defined(__KEIL__) || defined(__C51__)
+		#define INLINE	__inline
+	#else
+		#define INLINE	inline
+	#endif
 #else
 	#undef INLINE
 	#define INLINE
diff --git a/src/gwin/class_gwin.h b/src/gwin/class_gwin.h
index 995121b7..b32e4da2 100644
--- a/src/gwin/class_gwin.h
+++ b/src/gwin/class_gwin.h
@@ -23,6 +23,10 @@
 
 #if GFX_USE_GWIN || defined(__DOXYGEN__)
 
+#if defined(__KEIL__) || defined(__C51__)
+	#pragma anon_unions
+#endif
+
 /**
  * @brief	The predefined flags for a Window
  * @{