diff --git a/src/main/java/com/imsweb/seerapi/client/disease/DiseaseService.java b/src/main/java/com/imsweb/seerapi/client/disease/DiseaseService.java
index bfd2b95..003001d 100644
--- a/src/main/java/com/imsweb/seerapi/client/disease/DiseaseService.java
+++ b/src/main/java/com/imsweb/seerapi/client/disease/DiseaseService.java
@@ -88,7 +88,7 @@ public interface DiseaseService {
      * @param morphology1 ICD O3 Morphology
      * @param morphology2 ICD O3 Morphology
      * @param year1 Year of Diagnosis1
-     * @param year1 Year of Diagnosis2
+     * @param year2 Year of Diagnosis2
      * @return a SamePrimary object
      */
     @GET("disease/{version}/same_primary")