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-rw-r--r--src/2geom/polynomial.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/2geom/polynomial.h b/src/2geom/polynomial.h
index 601f504c1..5ab2aa4c8 100644
--- a/src/2geom/polynomial.h
+++ b/src/2geom/polynomial.h
@@ -36,6 +36,7 @@
#define LIB2GEOM_SEEN_POLY_H
#include <assert.h>
#include <vector>
+#include <iostream>
#include <algorithm>
#include <complex>
#include <2geom/coord.h>