diff --git a/src/shared/crypto.cpp b/src/shared/crypto.cpp
index d4ed83676..c1c35587d 100644
--- a/src/shared/crypto.cpp
+++ b/src/shared/crypto.cpp
@@ -7,7 +7,7 @@
  * http://www.cs.technion.ac.il/~biham/Reports/Tiger/
  */
 
-static const int tigerpasses = 3;
+static constexpr int tigerpasses = 3;
 
 namespace tiger
 {