diff --git a/src/add-ons/kernel/file_systems/iso9660/kernel_interface.c b/src/add-ons/kernel/file_systems/iso9660/kernel_interface.c
index 0d198f863f..30bb3c21fa 100644
--- a/src/add-ons/kernel/file_systems/iso9660/kernel_interface.c
+++ b/src/add-ons/kernel/file_systems/iso9660/kernel_interface.c
@@ -180,7 +180,7 @@ fs_mount(nspace_id nsid, const char *device, ulong flags, void *parms,
 	// Check for a 'nojoliet' parm
 	// all we check for is the existance of 'nojoliet' in the parms.
 	if (parms != NULL) {
-		int i;
+		uint32 i;
 		char *spot;
 		char *buf;