diff --git a/src/mutators.py b/src/mutators.py
index 616c7b5..fd022c7 100644
--- a/src/mutators.py
+++ b/src/mutators.py
@@ -124,12 +124,12 @@ class SmallCaps(TextMutator):
         return "".join(self._small_cap(char) for char in text)
 
     def _small_cap(char: str) -> str:
-        if "a" <= c <= "z":
-            return chr(ord(c) + 0x1D00 - ord("a"))
-        elif "A" <= c <= "Z":
-            return chr(ord(c) + 0x1D00 - ord("A"))
+        if "a" <= char <= "z":
+            return chr(ord(char) + 0x1D00 - ord("a"))
+        elif "A" <= char <= "Z":
+            return chr(ord(char) + 0x1D00 - ord("A"))
         else:
-            return c
+            return char
 
 
 class Zalgo(TextMutator):