diff --git a/.travis.yml b/.travis.yml
index d175f7fa42..d70d58bbbc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,6 +45,8 @@ script:
       ls -la v.exe
       echo "Running v test v..."
       ./v.exe test v
+      echo "Running v -os msvc test v..."
+      ./v -os msvc test v
       ##echo "Running only the repl tests directly"
       ##./v.exe ./compiler/tests/repl/repl_test.v
       echo "Testing gcc bootstrapping"
diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index b2d949625f..5d8bb61d70 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -22,7 +22,7 @@ fn new_array(mylen, cap, elm_size int) array {
 		len: mylen
 		cap: cap
 		element_size: elm_size
-		data: malloc(cap * elm_size)
+		data: calloc(cap * elm_size)
 	}
 	return arr
 }