kc3-lang/ftgl

diff --git a/src/FTExtrdGlyph.cpp b/src/FTExtrdGlyph.cpp
index fc9de47..42eaadf 100644
--- a/src/FTExtrdGlyph.cpp
+++ b/src/FTExtrdGlyph.cpp
@@ -1,3 +1,5 @@
+#include	<math.h>
+
 #include	"FTExtrdGlyph.h"
 #include	"FTVectoriser.h"
 #ifdef FTGL_DEBUG