diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 6b23b9789..93b3839de 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -56,8 +56,10 @@
 
 #ifdef _WIN32
 #define KRB5_CALLCONV __stdcall
+#define KRB5_LIB_CALL __stdcall
 #else
 #define KRB5_CALLCONV
+#define KRB5_LIB_CALL
 #endif
 
 /* simple constants */