diff --git a/gen/sam/genericsam_group_generator.py b/gen/sam/genericsam_group_generator.py
index 90933e3a..00d5ed6e 100644
--- a/gen/sam/genericsam_group_generator.py
+++ b/gen/sam/genericsam_group_generator.py
@@ -11,7 +11,7 @@ class GenericSamGroupGenerator(GroupGenerator):
     """
 
     @property
-    def groupNamePrefix(self):
+    def groupNamePrefix(self) -> str:
         # prefix the SAM site for use with the Skynet IADS plugin
         if self.faction == self.game.player_name: # this is the player faction
             return "BLUE SAM " 
diff --git a/gen/sam/group_generator.py b/gen/sam/group_generator.py
index 010650cc..9f150ef4 100644
--- a/gen/sam/group_generator.py
+++ b/gen/sam/group_generator.py
@@ -19,7 +19,7 @@ class GroupGenerator():
         wp.ETA_locked = True
 
     @property
-    def groupNamePrefix(self):
+    def groupNamePrefix(self) -> str:
         return ""
 
     def generate(self):