diff --git a/psl-core/src/main/java/org/linqs/psl/application/learning/weight/gradient/optimalvalue/StructuredPerceptron.java b/psl-core/src/main/java/org/linqs/psl/application/learning/weight/gradient/optimalvalue/StructuredPerceptron.java
index 63ec7f88b..d840d6f14 100644
--- a/psl-core/src/main/java/org/linqs/psl/application/learning/weight/gradient/optimalvalue/StructuredPerceptron.java
+++ b/psl-core/src/main/java/org/linqs/psl/application/learning/weight/gradient/optimalvalue/StructuredPerceptron.java
@@ -43,6 +43,8 @@ public StructuredPerceptron(List<Rule> rules, Database trainTargetDatabase, Data
 
     @Override
     protected void postInitGroundModel() {
+        super.postInitGroundModel();
+
         deepWeightRuleMAPIncompatibility = new float[groundedDeepWeightedRules.size()];
     }