diff --git a/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java b/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
index 390824005..9a499acad 100644
--- a/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
+++ b/core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
@@ -678,7 +678,7 @@ public class Renderer implements RenderingManager {
                     variableNames.add(statementRenderer.variableName(i));
                 }
                 if (hasTryCatch) {
-                    variableNames.add("$je");
+                    variableNames.add("$$je");
                 }
                 if (!variableNames.isEmpty()) {
                     writer.append("var ");
@@ -725,7 +725,7 @@ public class Renderer implements RenderingManager {
                 }
                 boolean hasTryCatch = tryCatchFinder.tryCatchFound;
                 if (hasTryCatch) {
-                    variableNames.add("$je");
+                    variableNames.add("$$je");
                 }
                 variableNames.add(context.pointerName());
                 variableNames.add(context.tempVarName());
diff --git a/core/src/main/java/org/teavm/backend/javascript/rendering/StatementRenderer.java b/core/src/main/java/org/teavm/backend/javascript/rendering/StatementRenderer.java
index c3fc58b11..bc7fbf1c3 100644
--- a/core/src/main/java/org/teavm/backend/javascript/rendering/StatementRenderer.java
+++ b/core/src/main/java/org/teavm/backend/javascript/rendering/StatementRenderer.java
@@ -1355,25 +1355,25 @@ public class StatementRenderer implements ExprVisitor, StatementVisitor {
                 protectedBody = nextStatement.getProtectedBody();
             }
             visitStatements(protectedBody);
-            writer.outdent().append("}").ws().append("catch").ws().append("($e)")
+            writer.outdent().append("}").ws().append("catch").ws().append("($$e)")
                     .ws().append("{").indent().softNewLine();
-            writer.append("$je").ws().append("=").ws().append("$e.$javaException;").softNewLine();
+            writer.append("$$je").ws().append("=").ws().append("$$e.$javaException;").softNewLine();
             for (TryCatchStatement catchClause : sequence) {
-                writer.append("if").ws().append("($je");
+                writer.append("if").ws().append("($$je");
                 if (catchClause.getExceptionType() != null) {
-                    writer.ws().append("&&").ws().append("$je instanceof ")
+                    writer.ws().append("&&").ws().append("$$je instanceof ")
                             .appendClass(catchClause.getExceptionType());
                 }
                 writer.append(")").ws().append("{").indent().softNewLine();
                 if (catchClause.getExceptionVariable() != null) {
                     writer.append(variableName(catchClause.getExceptionVariable())).ws().append("=").ws()
-                            .append("$je;").softNewLine();
+                            .append("$$je;").softNewLine();
                 }
                 visitStatements(catchClause.getHandler());
                 writer.outdent().append("}").ws().append("else ");
             }
             writer.append("{").indent().softNewLine();
-            writer.append("throw $e;").softNewLine();
+            writer.append("throw $$e;").softNewLine();
             writer.outdent().append("}").softNewLine();
             writer.outdent().append("}").softNewLine();
         } catch (IOException e) {