diff --git a/CHANGELOG.md b/CHANGELOG.md
index 549ea2c3..094d3e20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ Version 264:
 * Fix missing initializer warning in `basic_fields`
 * Remove unused functions in `impl/static_string.hpp`
 * Fix unused variable warning in `multi_buffer`
+* Fix header-only compilation errors in some configurations
 
 --------------------------------------------------------------------------------
 
diff --git a/include/boost/beast/core/detail/sha1.ipp b/include/boost/beast/core/detail/sha1.ipp
index f38be7d1..8d739f34 100644
--- a/include/boost/beast/core/detail/sha1.ipp
+++ b/include/boost/beast/core/detail/sha1.ipp
@@ -12,6 +12,7 @@
 
 #include <boost/beast/core/detail/sha1.hpp>
 
+#include <algorithm>
 #include <cstdint>
 #include <cstring>