diff --git a/source/Irrlicht/COSOperator.cpp b/source/Irrlicht/COSOperator.cpp
index 0899d1d..d0e25f4 100644
--- a/source/Irrlicht/COSOperator.cpp
+++ b/source/Irrlicht/COSOperator.cpp
@@ -13,7 +13,7 @@
 #include <unistd.h>
 #ifndef _IRR_SOLARIS_PLATFORM_
 #include <sys/types.h>
-#include <sys/sysctl.h>
+//#include <sys/sysctl.h>
 #endif
 #endif
 
