diff --git a/java/debugger/impl/src/com/intellij/debugger/engine/evaluation/expression/EvaluatorBuilderImpl.java b/java/debugger/impl/src/com/intellij/debugger/engine/evaluation/expression/EvaluatorBuilderImpl.java
index aca746c01d0b..bd6c2d4f52d5 100644
--- a/java/debugger/impl/src/com/intellij/debugger/engine/evaluation/expression/EvaluatorBuilderImpl.java
+++ b/java/debugger/impl/src/com/intellij/debugger/engine/evaluation/expression/EvaluatorBuilderImpl.java
@@ -393,6 +393,9 @@ public class EvaluatorBuilderImpl implements EvaluatorBuilder {
       if (lType == null || rType == null) {
         return false;
       }
+      if (!TypeConversionUtil.isNumericType(lType) || !TypeConversionUtil.isNumericType(rType)) {
+        return false;
+      }
       if (opType == JavaTokenType.EQEQ || opType == JavaTokenType.NE) {
         if (PsiType.NULL.equals(lType) || PsiType.NULL.equals(rType)) {
           return false;