diff --git a/Contrib/NSISdl/netinc.h b/Contrib/NSISdl/netinc.h
index 0bac8a0c..ed8bd002 100644
--- a/Contrib/NSISdl/netinc.h
+++ b/Contrib/NSISdl/netinc.h
@@ -24,7 +24,7 @@
 #define strcat lstrcat
 #define strlen lstrlen
 #define malloc(x) (new char[x])
-#define free(x) {delete x;}
+#define free(x) {delete [] x;}
 typedef int socklen_t;
 
 #ifndef INADDR_NONE