diff --git a/commands/mem.c b/commands/mem.c
index bc84f6d..73bf915 100644
--- a/commands/mem.c
+++ b/commands/mem.c
@@ -110,7 +110,7 @@
 	return 0;
 }
 
-int open_and_lseek(const char *filename, int mode, off_t pos)
+static int open_and_lseek(const char *filename, int mode, off_t pos)
 {
 	int fd, ret;