diff --git a/src/syncterm/st_crypt.h b/src/syncterm/st_crypt.h
index 799ed951a5f950255efdd3afb621c7930c044353..d9a704fecdf71266968db65f4fcf40fcf4088dcb 100644
--- a/src/syncterm/st_crypt.h
+++ b/src/syncterm/st_crypt.h
@@ -6,8 +6,10 @@
 #ifndef WITHOUT_CRYPTLIB
 #include <cryptlib.h>
 #if CRYPTLIB_VERSION < 3400
+#if CRYPTLIB_VERSION < 340 || CRYPTLIB_VERSION > 999
 #define CRYPT_ATTRIBUTE_ERRORMESSAGE	CRYPT_ATTRIBUTE_INT_ERRORMESSAGE
 #endif
+#endif
 
 struct crypt_funcs {
 	int (*PopData)( C_IN CRYPT_HANDLE envelope, C_OUT void C_PTR buffer,