diff --git a/src/source.c b/src/source.c
index f41a167835d89607b04f2851aaaf3915574426e7..7a45e9b4b66c0cfa23183283626fcaf5d4e5b22b 100644
--- a/src/source.c
+++ b/src/source.c
@@ -27,6 +27,7 @@
 #include <sys/time.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
+#include <limits.h>
 #else
 #include <winsock2.h>
 #include <windows.h>