diff --git a/src/osd/osdcomm.h b/src/osd/osdcomm.h
index 3658fbc4814..9ba457cbb93 100644
--- a/src/osd/osdcomm.h
+++ b/src/osd/osdcomm.h
@@ -225,6 +225,8 @@ typedef UINT32                              FPTR;
 
 #ifdef _MSC_VER
 #include <malloc.h>
+#include <BaseTsd.h>
+typedef SSIZE_T ssize_t;
 #if _MSC_VER == 1900 // < VS2015
 #define __LINE__Var 0
 #endif