diff --git a/libc/stdio/vfprintf.c b/libc/stdio/vfprintf.c
index 2ce0361..5a8aa0a 100644
--- a/libc/stdio/vfprintf.c
+++ b/libc/stdio/vfprintf.c
@@ -203,9 +203,9 @@
 	 * below longer.
 	 */
 #define	PADSIZE	16		/* pad chunk size */
-	static char blanks[PADSIZE] =
+	static const char blanks[PADSIZE] =
 	 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
-	static char zeroes[PADSIZE] =
+	static const char zeroes[PADSIZE] =
 	 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
 
 	/*