diff --git a/lib/install.go b/lib/install.go
index 537295b4..6163dcd7 100644
--- a/lib/install.go
+++ b/lib/install.go
@@ -57,7 +57,7 @@ func getInstallPath() string {
 // get versioned install filename (windows os runtime support)
 func getVersionedInstallFileName(tfversion string) string {
 	if runtime.GOOS == "windows" {
-		return getInstallLocation() + installVersion + tfversion + ".exe"
+		return filepath.Join(getInstallLocation(), installVersion + tfversion + ".exe")
 	}
 
 	return getInstallLocation() + installVersion + tfversion