diff --git a/Algorithms/DouglasPeucker.cpp b/Algorithms/DouglasPeucker.cpp
index 8b783c59a..bf1cc23e5 100644
--- a/Algorithms/DouglasPeucker.cpp
+++ b/Algorithms/DouglasPeucker.cpp
@@ -32,6 +32,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <boost/assert.hpp>
 
+#include <cmath>
+
 #include <limits>
 
 DouglasPeucker::DouglasPeucker()