diff --git a/src/cpHastySpace.c b/src/cpHastySpace.c
index 8dca425..a6b86ac 100644
--- a/src/cpHastySpace.c
+++ b/src/cpHastySpace.c
@@ -8,7 +8,7 @@
 
 //#include <sys/param.h >
 #ifndef _WIN32
-#include <sys/sysctl.h>
+#include <linux/sysctl.h>
 #include <pthread.h>
 #else
 #ifndef WIN32_LEAN_AND_MEAN
