diff --git a/C4.puml b/C4.puml
index 6d05a81..905edc3 100644
--- a/C4.puml
+++ b/C4.puml
@@ -106,9 +106,9 @@ rectangle C4VersionDetailsArea <<legendArea>> [
 
 !global $DOTTED_LINE = "dotted"
 !global $DASHED_LINE = "dashed"
-!$BOLD_LINE ?= "bold"
+!global $BOLD_LINE = "bold"
 ' solid is not defined in plantUML, but works as reset of all other styles too
-!$SOLID_LINE ?= "solid"
+!global $SOLID_LINE = "solid"
 
 !global $LEGEND_DETAILS_NONE = "none"
 !global $LEGEND_DETAILS_NORMAL = "normal"