diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index 5494aecdd..92db5f34a 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -16,6 +16,7 @@
* You should have received a copy of the GNU General Public License
* along with RawTherapee. If not, see .
*/
+
#include