diff --git a/scsh/scsh_aux.c b/scsh/scsh_aux.c
index 7374c5f..12a5c3b 100644
--- a/scsh/scsh_aux.c
+++ b/scsh/scsh_aux.c
@@ -1,6 +1,31 @@
 #include "scsh_aux.h"
 #include <signal.h>
 
+#ifndef SIGURG
+ #define SIGURG 9999
+#endif
+#ifndef SIGXCPU
+ #define SIGXCPU 9999
+#endif
+#ifndef SIGXFSZ
+ #define SIGXFSZ 9999
+#endif
+#ifndef SIGVTALRM
+ #define SIGVTALRM 9999
+#endif
+#ifndef SIGPROF
+ #define SIGPROF 9999
+#endif
+#ifndef SIGWINCH
+ #define SIGWINCH 9999
+#endif
+#ifndef SIGIO
+ #define SIGIO 9999
+#endif
+#ifndef SIGPWR
+ #define SIGPWR 9999
+#endif
+
 int main(int argc, char* argv[]){
   int signr = atoi(argv[1]);