diff --git a/src/main/java/gov/cms/mat/cql_elm_translation/service/filters/CqlTranslatorExceptionFilter.java b/src/main/java/gov/cms/mat/cql_elm_translation/service/filters/CqlTranslatorExceptionFilter.java
index 05dafe2..2414c59 100644
--- a/src/main/java/gov/cms/mat/cql_elm_translation/service/filters/CqlTranslatorExceptionFilter.java
+++ b/src/main/java/gov/cms/mat/cql_elm_translation/service/filters/CqlTranslatorExceptionFilter.java
@@ -4,6 +4,7 @@
 import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.cqframework.cql.cql2elm.CqlCompilerException;
 import org.hl7.elm.r1.VersionedIdentifier;
 
@@ -113,7 +114,7 @@ private List<CqlCompilerException> filterBySyntax(
   }
 
   /*
-   * MAT-7995: error: "No Viable Input at 'define :'"
+   * MAT-7995: error: "No viable alternative at input 'define :'"
    * should be customized as: "Definition is missing a name."
    * This is done in cql-antlr-parse, so on the frontend we don't want a duplicate error message
    * therefore we are filtering it out here.
@@ -123,9 +124,8 @@ private List<CqlCompilerException> filterOutCustomErrors(
     return filteredCqlTranslatorExceptions.stream()
         .filter(
             cqlCompilerException ->
-                !cqlCompilerException
-                    .getMessage()
-                    .contains("no viable alternative at input 'define"))
+                !StringUtils.containsIgnoreCase(
+                    cqlCompilerException.getMessage(), "no viable alternative at input 'define"))
         .toList();
   }
 }