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-rw-r--r--src/lib/colour_conversion.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/lib/colour_conversion.cc b/src/lib/colour_conversion.cc
index 73ee72249..48fd6ed9c 100644
--- a/src/lib/colour_conversion.cc
+++ b/src/lib/colour_conversion.cc
@@ -29,6 +29,7 @@
using std::list;
using std::string;
+using std::stringstream;
using std::cout;
using std::vector;
using boost::shared_ptr;