--- a/opjitconv/opjitconv.c
+++ b/opjitconv/opjitconv.c
@@ -216,7 +216,7 @@
 	int file_locked = 0;
 	unsigned int usecs_waited = 0;
 	int rc = OP_JIT_CONV_OK;
-	int fd = open(dumpfile, S_IRUSR);
+	int fd = open(dumpfile, O_RDONLY);
 	if (fd < 0) {
 		perror("opjitconv failed to open JIT dumpfile");
 		return OP_JIT_CONV_FAIL;