diff --git a/backend/pcx.c b/backend/pcx.c
index bae543ca..0eb8cad0 100644
--- a/backend/pcx.c
+++ b/backend/pcx.c
@@ -39,6 +39,7 @@
 #ifdef _MSC_VER
 #include <io.h>
 #include <fcntl.h>
+#include <malloc.h>
 #endif
 
 #define SSET	"0123456789ABCDEF"
diff --git a/backend/svg.c b/backend/svg.c
index f3da93e2..d9d4c539 100644
--- a/backend/svg.c
+++ b/backend/svg.c
@@ -35,6 +35,10 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
+#ifdef _MSC_VER
+#include <malloc.h>
+#endif
+
 #include "common.h"
 
 #define SSET	"0123456789ABCDEF"