diff --git a/dlls/kernel32/kernel_main.c b/dlls/kernel32/kernel_main.c
index be1212f..3699ff7 100644
--- a/dlls/kernel32/kernel_main.c
+++ b/dlls/kernel32/kernel_main.c
@@ -43,7 +43,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(process);
 
-extern  int __wine_set_signal_handler(unsigned, int (*)(unsigned));
+extern int CDECL __wine_set_signal_handler(unsigned, int (*)(unsigned));
 
 static ULONGLONG server_start_time;