diff --git a/include/sigar_private.h b/include/sigar_private.h
index 54f71a31..6635863c 100644
--- a/include/sigar_private.h
+++ b/include/sigar_private.h
@@ -31,8 +31,10 @@
 
 #ifndef WIN32
 #include <unistd.h>
+#ifndef DARWIN
 #include <strings.h>
 #endif
+#endif
 
 #ifdef DMALLOC
 #define _MEMORY_H /* exclude memory.h on solaris */