diff --git a/src/interfaces/libpq/win32.h b/src/interfaces/libpq/win32.h
index b2a5e3db74..2565700c92 100644
--- a/src/interfaces/libpq/win32.h
+++ b/src/interfaces/libpq/win32.h
@@ -8,7 +8,7 @@
 
 
 #define NO_UNISTD_H
-
+#define SOCKET_SIZE_TYPE int
 
 /*
  * Some compat functions
diff --git a/src/interfaces/libpq/win32.mak b/src/interfaces/libpq/win32.mak
index 7260f977ab..60c70a9a00 100644
--- a/src/interfaces/libpq/win32.mak
+++ b/src/interfaces/libpq/win32.mak
@@ -33,7 +33,7 @@ CLEAN :
 	-@erase "$(OUTDIR)\libpq.lib"
 	-@erase "$(OUTDIR)\libpq.dll"
 	-@erase "$(OUTDIR)\libpq.res"
-	-@erase "vc50.pch"
+	-@erase "*.pch"
 	-@erase "$(OUTDIR)\libpq.pch"
 	-@erase "$(OUTDIR)\libpqdll.exp"
 	-@erase "$(OUTDIR)\libpqdll.lib"