diff --git a/ogr/ogrlinestring.cpp b/ogr/ogrlinestring.cpp
index 1e16d9f..cf7ced1 100644
--- a/ogr/ogrlinestring.cpp
+++ b/ogr/ogrlinestring.cpp
@@ -35,6 +35,7 @@
 #include <cstdlib>
 #include <algorithm>
 #include <limits>
+#include <cmath>
 
 CPL_CVSID("$Id: ogrlinestring.cpp ad9178b63f501e9840d86a3220c9e5100c6e3fa2 2019-10-21 13:19:06 +0200 Even Rouault $")