diff --git a/src/stc/scintilla/src/Editor.cxx b/src/stc/scintilla/src/Editor.cxx
index cd72953ae7..8c19154313 100644
--- a/src/stc/scintilla/src/Editor.cxx
+++ b/src/stc/scintilla/src/Editor.cxx
@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <assert.h>
+#include <math.h>

 #include <string>
 #include <vector>