diff --git a/src/kernel/core/port.c b/src/kernel/core/port.c
index 2147e89e03..af0e8033f1 100644
--- a/src/kernel/core/port.c
+++ b/src/kernel/core/port.c
@@ -458,7 +458,7 @@ _get_next_port_info(team_id team, int32 *cookie, struct port_info *info, size_t
 	if (cookie == NULL)
 		return B_BAD_VALUE;
 
-	if (*cookie == NULL) {
+	if (*cookie == 0) {
 		// return first found
 		slot = 0;
 	} else {
diff --git a/src/kernel/core/sem.c b/src/kernel/core/sem.c
index 025d810100..acfdaed052 100644
--- a/src/kernel/core/sem.c
+++ b/src/kernel/core/sem.c
@@ -667,7 +667,7 @@ _get_next_sem_info(team_id team, int32 *cookie, struct sem_info *info, size_t sz
 	if (team < 0)
 		return B_BAD_TEAM_ID; 
 
-	if (*cookie == NULL) {
+	if (*cookie == 0) {
 		// return first found
 		slot = 0;
 	}