1 files changed, 3 insertions, 3 deletions
diff --git a/lib/compilers/wsl-vc.js b/lib/compilers/wsl-vc.js
index edc3b8062..5e1f24d8c 100644
--- a/lib/compilers/wsl-vc.js
+++ b/lib/compilers/wsl-vc.js
@@ -69,10 +69,10 @@ export class WslVcCompiler extends Win32VcCompiler {
         options.env = Object.assign({}, options.env);
 
         let old_env = options.env['WSLENV'];
-        if (!old_env) {
-            old_env = '';
-        } else {
+        if (old_env) {
             old_env = ':' + old_env;
+        } else {
+            old_env = '';
         }
         options.env['WSLENV'] = 'INCLUDE:LIB' + old_env;