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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/GuardStatement.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/GuardStatement.java
new file mode 100755
index 000000000..23733e9c1
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/GuardStatement.java
@@ -0,0 +1,55 @@
+package org.simantics.scl.compiler.elaboration.expressions.block;
+
+import org.simantics.scl.compiler.elaboration.contexts.EnvironmentalContext;
+import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
+import org.simantics.scl.compiler.elaboration.expressions.EBind;
+import org.simantics.scl.compiler.elaboration.expressions.ESimpleLet;
+import org.simantics.scl.compiler.elaboration.expressions.EVariable;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.elaboration.expressions.Variable;
+import org.simantics.scl.compiler.errors.Locations;
+
+public class GuardStatement extends Statement {
+    public Expression value;
+    
+    public GuardStatement(Expression value) {
+        this.value = value;
+    }
+
+    @Override
+    public Expression toExpression(EnvironmentalContext context, boolean monadic, Expression in) {
+        Variable var = new Variable("_");
+        if(monadic)
+            return new EBind(location, new EVariable(location, var), value, in);
+        else
+            return new ESimpleLet(location, var, value, in);
+    }
+    
+    @Override
+    public void setLocationDeep(long loc) {
+        if(location == Locations.NO_LOCATION) {
+            location = loc;
+            value.setLocationDeep(loc);
+        }
+    }
+    
+    @Override
+    public void resolvePattern(TranslationContext context) {
+    }
+    
+    @Override
+    public boolean mayBeRecursive() {
+        return false;
+    }
+    
+    @Override
+    public Statement replace(ReplaceContext context) {
+        return new GuardStatement(value.replace(context));
+    }
+    
+    @Override
+    public void accept(StatementVisitor visitor) {
+        visitor.visit(this);
+    }
+}