diff --git a/lib/modules/__builtin.pmod/Nettle.pmod/Sign.pike b/lib/modules/__builtin.pmod/Nettle.pmod/Sign.pike
index 61caa32ca1bd447394d48d949cedd4fde919ce03..775daa638979583a1b689c9b5828dbb742b5ec02 100644
--- a/lib/modules/__builtin.pmod/Nettle.pmod/Sign.pike
+++ b/lib/modules/__builtin.pmod/Nettle.pmod/Sign.pike
@@ -1,3 +1,6 @@
+#pike __REAL_VERSION__
+#pragma strict_types
+
 //!
 //! Base class for cryptographic signature algorithms.
 //!