1 files changed, 1 insertions, 1 deletions
diff --git a/signs.h b/signs.h
index 9e4e37d20..cdb00c49a 100644
--- a/signs.h
+++ b/signs.h
@@ -22,7 +22,7 @@ extern MemoryPool _sign_pool;
 /**
  * Check if a Sign really exists.
  */
-static inline bool IsValidSign(SignStruct* ss)
+static inline bool IsValidSign(const SignStruct* ss)
 {
 	return ss->str != 0;
 }