diff --git a/include/mtl/string.hpp b/include/mtl/string.hpp
index ffe5244..4a8e0fe 100644
--- a/include/mtl/string.hpp
+++ b/include/mtl/string.hpp
@@ -96,9 +96,6 @@ public:
 
 	istring& erase(size_t index = 0, size_t count = npos);
 
-	void push_back(char ch);
-	void pop_back();
-
 	istring& append(const string_view& str);
 	istring& append(const string_view& str, size_t str_index, size_t count = npos);
 	istring& append(size_t count, char ch);