diff --git a/third_party/machinarium/sources/zpq_stream.h b/third_party/machinarium/sources/zpq_stream.h
index 70ef5e2..f86b3d2 100644
--- a/third_party/machinarium/sources/zpq_stream.h
+++ b/third_party/machinarium/sources/zpq_stream.h
@@ -9,6 +9,7 @@
 #define MM_ZPQ_STREAM_H
 
 #include <stdlib.h>
+#include <sys/types.h>
 
 #define MM_ZPQ_IO_ERROR (-1)
 #define MM_ZPQ_DECOMPRESS_ERROR (-2)