diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index babff0f..9c83594 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -421,7 +421,7 @@
 
 static int is_exec(unsigned char *extension)
 {
-	unsigned char *exe_extensions = "EXECOMBAT", *walk;
+	unsigned char exe_extensions[] = "EXECOMBAT", *walk;
 
 	for (walk = exe_extensions; *walk; walk += 3)
 		if (!strncmp(extension, walk, 3))