diff --git a/include/mtl/utility.hpp b/include/mtl/utility.hpp
index 9977424..e6aa5cd 100644
--- a/include/mtl/utility.hpp
+++ b/include/mtl/utility.hpp
@@ -4,6 +4,7 @@
 #include <cstddef>
 
 extern "C" {
+#ifdef __ARM_ARCH_4T__
 void mtl_memcpy32(void* dst, const void* src, size_t num8);
 void mtl_dumbcpy16(void* dst, const void* src, size_t num8);
 void mtl_dumbcpy(void* dst, const void* src, size_t num8);
@@ -13,9 +14,22 @@ void mtl_rdumbcpy16(void* dst, const void* src, size_t num8);
 void mtl_rdumbcpy(void* dst, const void* src, size_t num8);
 void mtl_rhybridcpy(void* dst, const void* src, size_t num8);
 void mtl_hybridmove(void* dst, const void* src, size_t num8);
+
+uint32_t mtl_udiv10(uint32_t x);
+uint32_t mtl_umod10(uint32_t x);
+uint32_t mtl_utostr(uint32_t x, char* buf, size_t buf_size, char** buf_out);
+uint32_t mtl_utostrx(uint32_t x, char* buf, size_t buf_size, char** buf_out);
+uint32_t mtl_itostr(uint32_t x, char* buf, size_t buf_size, char** buf_out);
+uint32_t mtl_itostrx(uint32_t x, char* buf, size_t buf_size, char** buf_out);
+#endif
 }
 
 namespace mtl {
+#ifdef __ARM_ARCH_4T__
 	constexpr auto memcpy = mtl_hybridcpy;
 	constexpr auto memmove = mtl_hybridmove;
+#else
+	constexpr auto memcpy = std::memcpy;
+	constexpr auto memmove = std::memmove;
+#endif
 }