diff --git a/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmInterpretationsKey.java b/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmInterpretationsKey.java
index c392da27216f..a3611784e15b 100644
--- a/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmInterpretationsKey.java
+++ b/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmInterpretationsKey.java
@@ -150,6 +150,6 @@ public int hashCode() {
 
 	@Override
 	public String toString() {
-		return query.toString() + " : " + resultType.getSimpleName();
+		return query.toString() + (resultType != null ? " : " + resultType.getSimpleName() : "");
 	}
 }