diff --git a/gnu/dist/toolchain/gcc/f/proj.h b/gnu/dist/toolchain/gcc/f/proj.h
index 47fc2f94ab73..84c3a7cd6c72 100644
--- a/gnu/dist/toolchain/gcc/f/proj.h
+++ b/gnu/dist/toolchain/gcc/f/proj.h
@@ -66,8 +66,6 @@ typedef enum
     Doggone_Trailing_Comma_Dont_Work = 1
   } bool;
 
-#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
-
 #ifndef UNUSED	/* Compile with -DUNUSED= if cc doesn't support this. */
 #if BUILT_WITH_270
 #define UNUSED __attribute__ ((unused))