diff --git a/src/numeric/str.cpp b/src/numeric/str.cpp
index 7c3ac13..81e936d 100644
--- a/src/numeric/str.cpp
+++ b/src/numeric/str.cpp
@@ -4,4 +4,6 @@
 {
 template char* uintToStr<16>(char*, uintptr_t, uint8_t) noexcept;
 template char* uintToStr<10>(char*, uintptr_t, uint8_t) noexcept;
+template uintptr_t strToUInt<16>(std::string_view);
+template uintptr_t strToUInt<10>(std::string_view);
 } // namespace stdplus::detail