diff --git a/src/dparse/parser.d b/src/dparse/parser.d
index 572dd6d8..96c519e6 100644
--- a/src/dparse/parser.d
+++ b/src/dparse/parser.d
@@ -8888,7 +8888,8 @@ protected: final:
             else
                 import std.experimental.checkedint;
 
-            ++suppressMessages.back.checked;
+            auto ci = suppressMessages.back.checked;
+            suppressMessages.back = (ci + 1).get;
         }
         while (shouldAdvance && moreTokens())
         {