* Headers only include <iosfwd> from now on, since that contains all the

[ginac.git] / ginac / constant.cpp

diff --git a/ginac/constant.cpp b/ginac/constant.cpp
index d6c07409a32d1ed581b6c0cbed444c6161ba9c9b..0cf7c77bbdcf4419d144abdf6c5d006506534700 100644 (file)
--- a/ginac/constant.cpp
+++ b/ginac/constant.cpp
@@ -22,6 +22,7 @@
 
 #include <string>
 #include <stdexcept>
+#include <iostream>
 
 #include "constant.h"
 #include "numeric.h"