diff --git a/lib/krb5/config_file.c b/lib/krb5/config_file.c
index 1874de2b4..716413439 100644
--- a/lib/krb5/config_file.c
+++ b/lib/krb5/config_file.c
@@ -1081,7 +1081,7 @@ krb5_config_vget_strings(krb5_context context,
 			 va_list args)
 {
     char **strings = NULL;
-    int nstr = 0;
+    size_t nstr = 0;
     const krb5_config_binding *b = NULL;
     const char *p;