diff --git a/resources/cql/DKTK_STRAT_HISTOLOGY_STRATIFIER b/resources/cql/DKTK_STRAT_HISTOLOGY_STRATIFIER
index 2a56610..1c5c077 100644
--- a/resources/cql/DKTK_STRAT_HISTOLOGY_STRATIFIER
+++ b/resources/cql/DKTK_STRAT_HISTOLOGY_STRATIFIER
@@ -1,5 +1,5 @@
 define Histo:
 if InInitialPopulation then [Observation] else {} as List <Observation>
 
-define function Histlogoy(histo FHIR.Observation):
+define function Histology(histo FHIR.Observation):
  if histo.code.coding.where(code = '59847-4').code.first() is null then 0 else 1
diff --git a/src/util.rs b/src/util.rs
index 3edf6cb..09e144a 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -486,7 +486,7 @@ mod test {
         assert_eq!(replace_cql(decoded_library), expected_result);
 
         let decoded_library = "DKTK_STRAT_HISTOLOGY_STRATIFIER";
-        let expected_result = "define Histo:\nif InInitialPopulation then [Observation] else {} as List <Observation>\n\ndefine function Histlogoy(histo FHIR.Observation):\n if histo.code.coding.where(code = '59847-4').code.first() is null then 0 else 1\n";
+        let expected_result = "define Histo:\nif InInitialPopulation then [Observation] else {} as List <Observation>\n\ndefine function Histology(histo FHIR.Observation):\n if histo.code.coding.where(code = '59847-4').code.first() is null then 0 else 1\n";
         assert_eq!(replace_cql(decoded_library), expected_result);
 
         let decoded_library = "INVALID_KEY";