diff --git a/include/libcamera/base/internal/cxx20.h b/include/libcamera/base/internal/cxx20.h
index 1f4caf56f8..d47168a70a 100644
--- a/include/libcamera/base/internal/cxx20.h
+++ b/include/libcamera/base/internal/cxx20.h
@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <type_traits>
+
 /**
  * \internal
  * \file cxx20.h
@@ -39,4 +41,18 @@ template<typename T> struct type_identity {
  */
 template<typename T> using type_identity_t = typename type_identity<T>::type;
 
+/**
+ * \internal
+ * \brief std::has_single_bit()
+ *
+ * Implementation of std::has_single_bit() for C++17.
+ */
+template<typename T>
+constexpr bool has_single_bit(T x) noexcept
+{
+	static_assert(std::is_unsigned_v<T>);
+
+	return x != 0 && (x & (x - 1)) == 0;
+}
+
 } /* namespace libcamera::internal::cxx20 */