diff --git a/gdbserver/gdb-server.c b/gdbserver/gdb-server.c
index 459d101..a3ed335 100644
--- a/gdbserver/gdb-server.c
+++ b/gdbserver/gdb-server.c
@@ -11,6 +11,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <signal.h>
 #include <unistd.h>
 #include <sys/types.h>
 #ifdef __MINGW32__