diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index c4403cdf3433ddc79515dac25e5eedd0b39fa320..eca4a3129129751208b41cfe808e9e31e5dc7b5f 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2950,7 +2950,7 @@ void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
 		return;
 	}
 
-	p += snprintf(p, maxlen, policy_modes[mode]);
+	p += snprintf(p, maxlen, "%s", policy_modes[mode]);
 
 	if (flags & MPOL_MODE_FLAGS) {
 		p += snprintf(p, buffer + maxlen - p, "=");