diff --git a/tornado-drivers/opencl/src/main/java/uk/ac/manchester/tornado/drivers/opencl/graal/compiler/OCLBlockVisitor.java b/tornado-drivers/opencl/src/main/java/uk/ac/manchester/tornado/drivers/opencl/graal/compiler/OCLBlockVisitor.java
index a547ebf7b7..2c2585d232 100644
--- a/tornado-drivers/opencl/src/main/java/uk/ac/manchester/tornado/drivers/opencl/graal/compiler/OCLBlockVisitor.java
+++ b/tornado-drivers/opencl/src/main/java/uk/ac/manchester/tornado/drivers/opencl/graal/compiler/OCLBlockVisitor.java
@@ -514,7 +514,7 @@ private void closeBranchBlock(HIRBlock block) {
             closeIfBlock(block, dom);
         } else if (isSwitchBlockNode(block)) {
             closeSwitchBlock(block, dom);
-        } else if (isNestedIfNode(block) && (!isStartNode(block))) {
+        } else if (isNestedIfNode(block) && (!isStartNode(block) && (!isMergeBlock(block)))) {
             closeBlock(block);
         } else if (isReturnBranchWithMerge(dom, block)) {
             closeBlock(block);