diff --git a/src/modules/decklink/producer/decklink_producer.cpp b/src/modules/decklink/producer/decklink_producer.cpp
index 17e7995633..4179f7adb6 100644
--- a/src/modules/decklink/producer/decklink_producer.cpp
+++ b/src/modules/decklink/producer/decklink_producer.cpp
@@ -115,7 +115,7 @@ struct Filter
                 //else if (dm->GetFlags() & bmdDisplayModeColorspaceRec2020) {
                 //}
                 if (!colorspace.empty()) {
-                    filter_spec = (boost::format("colorspace=iall=%s:all=%s,") % colorspace).str() + filter_spec;
+                    filter_spec = (boost::format("colorspace=iall=%s:all=%s,") % colorspace % colorspace).str() + filter_spec;
                 }
             }