diff --git a/platform/lang-api/src/com/intellij/lang/folding/FoldingDescriptor.java b/platform/lang-api/src/com/intellij/lang/folding/FoldingDescriptor.java
index 1e066b303a92..1b2253bb7555 100644
--- a/platform/lang-api/src/com/intellij/lang/folding/FoldingDescriptor.java
+++ b/platform/lang-api/src/com/intellij/lang/folding/FoldingDescriptor.java
@@ -94,7 +94,7 @@ public class FoldingDescriptor {
                            @Nullable FoldingGroup group,
                            Set<Object> dependencies,
                            boolean neverExpands) {
-    assert range.getStartOffset() + 1 < range.getEndOffset() : range + ", text: " + node.getText();
+    assert range.getStartOffset() + 1 < range.getEndOffset() : range + ", text: " + node.getText() + ", language = " + node.getPsi().getLanguage();
     myElement = node;
     ProperTextRange.assertProperRange(range);
     myRange = range;