diff --git a/contrib/gcc/config/arm/arm.h b/contrib/gcc/config/arm/arm.h
index 784142cfb77c..20a869f5ea63 100644
--- a/contrib/gcc/config/arm/arm.h
+++ b/contrib/gcc/config/arm/arm.h
@@ -507,7 +507,7 @@ extern int arm_structure_size_boundary;
 /* wchar_t is unsigned under the AAPCS.  */
 #ifndef WCHAR_TYPE
 #define WCHAR_TYPE (TARGET_AAPCS_BASED ? "unsigned int" : "int")
-
+#undef  WCHAR_TYPE_SIZE
 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 #endif