diff --git a/src/shared/proparser/qmakeevaluator.cpp b/src/shared/proparser/qmakeevaluator.cpp
index 569145dac2da08ff87b18281e000533c3892a0a7..ed1d0a619e5f7056257bb2d8952f4a25ba375797 100644
--- a/src/shared/proparser/qmakeevaluator.cpp
+++ b/src/shared/proparser/qmakeevaluator.cpp
@@ -453,7 +453,7 @@ void QMakeEvaluator::evaluateExpression(
             break; }
         case TokEnvVar: {
             const ProString &var = getStr(tokPtr);
-            const ProString &val = ProString(m_option->getEnv(var.toQString(m_tmp1)));
+            const ProString &val = ProString(m_option->getEnv(var.toQString()));
             debugMsg(2, "env var %s => %s", dbgStr(var), dbgStr(val));
             addStr(val, ret, pending, joined);
             break; }