diff --git a/src/util-sysfs.c b/src/util-sysfs.c
index 8fd791a460..11f1854a8c 100644
--- a/src/util-sysfs.c
+++ b/src/util-sysfs.c
@@ -47,7 +47,7 @@ TmEcode SysFsWriteValue(const char *path, int64_t value)
         SCReturnInt(TM_ECODE_FAILED);
     }
 
-    snprintf(sentence, sizeof(sentence), "%ld", value);
+    snprintf(sentence, sizeof(sentence), "%" PRIu64, value);
     ssize_t len = strlen(sentence);
 
     if (write(fd, sentence, len) != len) {