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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/plan/ClaimOp.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/plan/ClaimOp.java
new file mode 100644
index 000000000..663d23700
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/plan/ClaimOp.java
@@ -0,0 +1,38 @@
+package org.simantics.scl.compiler.elaboration.chr.plan;
+
+import org.simantics.scl.compiler.compilation.CompilationContext;
+import org.simantics.scl.compiler.elaboration.chr.relations.CHRConstraint;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.internal.codegen.references.IVal;
+import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;
+
+public class ClaimOp extends PlanOp {
+
+    CHRConstraint constraint;
+    Expression[] parameters;
+
+    public ClaimOp(long location, CHRConstraint constraint, Expression[] parameters) {
+        super(location);
+        this.constraint = constraint;
+        this.parameters = parameters;
+    }
+
+    @Override
+    public void toString(StringBuilder b) {
+        b.append("CLAIM   ").append(constraint);
+        for (Expression parameter : parameters)
+            b.append(" (").append(parameter).append(')');
+    }
+
+    @Override
+    public void generateCode(CompilationContext context, PlanContext planContext, CodeWriter w) {
+        IVal[] parameterVars = new IVal[parameters.length+1];
+        parameterVars[0] = planContext.generateNewId(location, w);
+        for(int i=0;i<parameters.length;++i)
+            parameterVars[i+1] = parameters[i].toVal(context.environment, w);
+        IVal newFact = w.apply(location, constraint.constructor, parameterVars);
+        w.apply(location, constraint.addProcedure, planContext.storeVar, newFact);
+        planContext.nextOp(w);
+    }
+
+}