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-rw-r--r--src/drivers/PostScript/Fl_PostScript_image.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/drivers/PostScript/Fl_PostScript_image.cxx b/src/drivers/PostScript/Fl_PostScript_image.cxx
index ae53aaadc..e6b2d6255 100644
--- a/src/drivers/PostScript/Fl_PostScript_image.cxx
+++ b/src/drivers/PostScript/Fl_PostScript_image.cxx
@@ -20,6 +20,7 @@
#include <stdio.h>
#include <math.h>
#include <string.h>
+#include <stdlib.h> // abs(int)
#include <FL/Fl_PostScript.H>
#include "Fl_PostScript_Graphics_Driver.H"