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-rw-r--r--src/widgets/sp-attribute-widget.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/widgets/sp-attribute-widget.h b/src/widgets/sp-attribute-widget.h
index d9b972201..a48d2643d 100644
--- a/src/widgets/sp-attribute-widget.h
+++ b/src/widgets/sp-attribute-widget.h
@@ -19,6 +19,8 @@
# include "config.h"
#endif
+#include <glibmm/threads.h>
+
#include <gtkmm/widget.h>
#include <stddef.h>
#include <sigc++/connection.h>