diff --git a/include/transport/memoryusage.h b/include/transport/memoryusage.h
index 563d0e93a25e571749ac10e5ed512ea7d336f9e4..605dd157068abc9202f2b6f158e01663db2c578c 100644
--- a/include/transport/memoryusage.h
+++ b/include/transport/memoryusage.h
@@ -24,12 +24,10 @@
 
 #ifndef WIN32
 #include "signal.h"
+#else 
+#define pid_t void*
 #endif
 
 namespace Transport {
-
-#ifndef WIN32
 	void process_mem_usage(double& shared, double& resident_set, pid_t pid = 0);
-#endif
-
 }