diff --git a/.gitignore b/.gitignore
index 44198b5..e147cfc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,8 @@ Makefile
 *.a
 *.so
 *.dylib
+*.dll
+*.exe
 keva-stratum
 
 # Configs
diff --git a/cnutil/src/crypto/tree-hash.c b/cnutil/src/crypto/tree-hash.c
index b2dc3ff..8907173 100644
--- a/cnutil/src/crypto/tree-hash.c
+++ b/cnutil/src/crypto/tree-hash.c
@@ -34,7 +34,7 @@
 
 #include "hash-ops.h"
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(__MINGW64__) || defined(__MINGW32__)
 #include <malloc.h>
 #elif !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__DragonFly__) \
   && !defined(__NetBSD__)