diff --git a/trunk/source/BoogieProcedureInliner/src/de/uni_freiburg/informatik/ultimate/boogie/procedureinliner/backtranslation/ExpressionBacktranslation.java b/trunk/source/BoogieProcedureInliner/src/de/uni_freiburg/informatik/ultimate/boogie/procedureinliner/backtranslation/ExpressionBacktranslation.java
index 5457af39aa..25345f4233 100644
--- a/trunk/source/BoogieProcedureInliner/src/de/uni_freiburg/informatik/ultimate/boogie/procedureinliner/backtranslation/ExpressionBacktranslation.java
+++ b/trunk/source/BoogieProcedureInliner/src/de/uni_freiburg/informatik/ultimate/boogie/procedureinliner/backtranslation/ExpressionBacktranslation.java
@@ -144,7 +144,7 @@ public Expression processExpression(final Expression expr) {
 			Expression newExpr = new IdentifierExpression(location, type, translatedId, translatedDeclInfo);
 			ModelUtils.copyAnnotations(expr, newExpr);
 			if (mapping.getGlobalInOldExprOfProc() != null) {
-				newExpr = new UnaryExpression(location, type, Operator.OLD, idExpr);
+				newExpr = new UnaryExpression(location, type, Operator.OLD, newExpr);
 			}
 			if (translatedDeclInfo.getStorageClass() == GLOBAL || translatedDeclInfo.getStorageClass() == QUANTIFIED
 					|| mActiveProcedures.contains(translatedDeclInfo.getProcedure())) {