diff --git a/security/dummy.c b/security/dummy.c
index 48cf302..f50c6c3 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -968,7 +968,7 @@
 	return -EOPNOTSUPP;
 }
 
-static int dummy_secctx_to_secid(char *secdata, u32 seclen, u32 *secid)
+static int dummy_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
 {
 	return -EOPNOTSUPP;
 }