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-rw-r--r--src/drivers/Cairo/Fl_Cairo_Graphics_Driver.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/drivers/Cairo/Fl_Cairo_Graphics_Driver.cxx b/src/drivers/Cairo/Fl_Cairo_Graphics_Driver.cxx
index ff64bfed0..b9d573a19 100644
--- a/src/drivers/Cairo/Fl_Cairo_Graphics_Driver.cxx
+++ b/src/drivers/Cairo/Fl_Cairo_Graphics_Driver.cxx
@@ -25,6 +25,7 @@
#include <FL/fl_draw.H>
#include <cairo/cairo.h>
#include <pango/pangocairo.h>
+#include <math.h>
// duplicated from Fl_PostScript.cxx
struct callback_data {