1 files changed, 1 insertions, 0 deletions
diff --git a/wx+/dc.h b/wx+/dc.h
index ff2f81bd..e1d803cb 100755
--- a/wx+/dc.h
+++ b/wx+/dc.h
@@ -8,6 +8,7 @@
 #define DC_H_4987123956832143243214
 
 #include <unordered_map>
+#include <optional>
 #include <zen/basic_math.h>
 #include <wx/dcbuffer.h> //for macro: wxALWAYS_NATIVE_DOUBLE_BUFFER
 #include <wx/dcscreen.h>