diff --git a/include/boost/algorithm/is_palindrome.hpp b/include/boost/algorithm/is_palindrome.hpp
index 8e1df18..531f82e 100644
--- a/include/boost/algorithm/is_palindrome.hpp
+++ b/include/boost/algorithm/is_palindrome.hpp
@@ -113,7 +113,7 @@ bool is_palindrome(const R& range, Predicate p)
 /// \note This function will return true for empty sequences and for palindromes.
 ///     For other sequences function will return false.
 ///     Complexity: O(N).
-bool is_palindrome(const char* str)
+inline bool is_palindrome(const char* str)
 {
     if(!str)
 	    return true;