diff --git a/lib/libc/locale/collate.c b/lib/libc/locale/collate.c
index 53b6c77c3134..fcbce98b451e 100644
--- a/lib/libc/locale/collate.c
+++ b/lib/libc/locale/collate.c
@@ -310,7 +310,7 @@ _collate_lookup(struct xlocale_collate *table, const wchar_t *t, int *len,
 	if ((sptr = *state) != NULL) {
 		*pri = *sptr;
 		sptr++;
-		if ((sptr == *state) || (*sptr == 0))
+		if ((sptr == *state) || (sptr == NULL))
 			*state = NULL;
 		else
 			*state = sptr;
@@ -451,6 +451,7 @@ _collate_wxfrm(struct xlocale_collate *table, const wchar_t *src, wchar_t *xf,
 						errno = EINVAL;
 						goto fail;
 					}
+					state = NULL;
 					pri = COLLATE_MAX_PRIORITY;
 				}
 				if (room) {
@@ -469,6 +470,7 @@ _collate_wxfrm(struct xlocale_collate *table, const wchar_t *src, wchar_t *xf,
 						errno = EINVAL;
 						goto fail;
 					}
+					state = NULL;
 					continue;
 				}
 				if (room) {
@@ -597,6 +599,7 @@ _collate_sxfrm(struct xlocale_collate *table, const wchar_t *src, char *xf,
 						errno = EINVAL;
 						goto fail;
 					}
+					state = NULL;
 					pri = COLLATE_MAX_PRIORITY;
 				}
 
@@ -622,6 +625,7 @@ _collate_sxfrm(struct xlocale_collate *table, const wchar_t *src, char *xf,
 						errno = EINVAL;
 						goto fail;
 					}
+					state = NULL;
 					continue;
 				}