1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/boot/printf.c b/arch/x86/boot/printf.c
index c1d00c0274c4..50e47cdbdddd 100644
--- a/arch/x86/boot/printf.c
+++ b/arch/x86/boot/printf.c
@@ -56,7 +56,7 @@ static char *number(char *str, long num, int base, int size, int precision,
         if (type & LEFT)
                 type &= ~ZEROPAD;
         if (base < 2 || base > 36)
-                return 0;
+                return NULL;
         c = (type & ZEROPAD) ? '0' : ' ';
         sign = 0;
         if (type & SIGN) {