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-rw-r--r--mu.vim2
1 files changed, 2 insertions, 0 deletions
diff --git a/mu.vim b/mu.vim
index afe7704b..faa4a1e4 100644
--- a/mu.vim
+++ b/mu.vim
@@ -40,6 +40,8 @@ syntax match muLiteral %\<-\?[0-9][0-9A-Fa-f]*\>%
 syntax match muLiteral %\<-\?0x[0-9A-Fa-f]\+\>%
 syntax match muLiteral %"[^"]*"%
 highlight link muLiteral Constant
+syntax match muError %\<[0-9][0-9A-Fa-f]*[^0-9A-Fa-f]\>%
+highlight link muError Error
 
 " sources of action at a distance
 syntax match muAssign "<-"