diff --git a/src/from_string.hpp b/src/from_string.hpp
index fae06634..82ffc047 100644
--- a/src/from_string.hpp
+++ b/src/from_string.hpp
@@ -29,6 +29,7 @@ namespace str
 {
   int from(const std::string_view, bool *);
   int from(const std::string_view, int *);
+  int from(const std::string_view, uint32_t *);
   int from(const std::string_view, uint64_t *);
   int from(const std::string_view, int64_t *);
   int from(const std::string_view, std::string *);