diff --git a/challenges/is-palindrome/solutions/c/function/string.c b/challenges/is-palindrome/solutions/c/function/string.c
index e35a928..8c9f88c 100644
--- a/challenges/is-palindrome/solutions/c/function/string.c
+++ b/challenges/is-palindrome/solutions/c/function/string.c
@@ -31,14 +31,13 @@ bool string_is_palindrome(const char* string) {
   return is_palindrome;
 }
 
-char* string_replace(const char* string, char search_value,
-                     char replace_value) {
+char* string_replace(const char* string, char search, char replace) {
   size_t string_length = strlen(string);
   char* result = malloc(sizeof(char) * (string_length + 1));
   for (size_t index = 0; index < string_length; index++) {
-    bool is_search_value = search_value == string[index];
+    bool is_search_value = search == string[index];
     if (is_search_value) {
-      character_append(result, replace_value);
+      character_append(result, replace);
     } else {
       character_append(result, string[index]);
     }
diff --git a/challenges/is-palindrome/solutions/c/function/string.h b/challenges/is-palindrome/solutions/c/function/string.h
index ec6bb8f..791047c 100644
--- a/challenges/is-palindrome/solutions/c/function/string.h
+++ b/challenges/is-palindrome/solutions/c/function/string.h
@@ -30,7 +30,7 @@ char* string_reverse(const char* string);
 bool string_is_palindrome(const char* string);
 
 /**
- * @brief Replace all the occurrences of search_value into replace_value in
+ * @brief Replace all the occurrences of search value into replace value in
  * the string.
  *
  * @param string
@@ -38,6 +38,6 @@ bool string_is_palindrome(const char* string);
  * @param replace_value A character containing the text to replace for match.
  * @return char*
  */
-char* string_replace(const char* string, char search_value, char replace_value);
+char* string_replace(const char* string, char search, char replace);
 
 #endif