diff --git a/src/compat.c b/src/compat.c
index d15457b..3247801 100644
--- a/src/compat.c
+++ b/src/compat.c
@@ -45,7 +45,7 @@ ssize_t getline(char **restrict lineptr, size_t *restrict n,
         if ('\n' == chr) break;
     }
 
-    ptr[len] = '\0';
+    *ptr = '\0';
 
     return (len == 0 ? -1 : len);
 }