diff --git a/src/StreamBuffer.h b/src/StreamBuffer.h
index a016089..e4cb6a6 100644
--- a/src/StreamBuffer.h
+++ b/src/StreamBuffer.h
@@ -23,6 +23,8 @@
 #include <string.h>
 #include <stdlib.h>
 
+#include <sys/types.h>
+
 #ifndef __GNUC__
 #define __attribute__(x)
 #endif