diff --git a/rc/c-family.kak b/rc/c-family.kak
index 97931620..16aea55e 100644
--- a/rc/c-family.kak
+++ b/rc/c-family.kak
@@ -72,7 +72,7 @@ def -hidden _c-family-indent-on-closing-curly-brace %[
 }
 
 # c++ specific
-addhl -group /cpp/code regex %{\<(this|true|false|NULL|nullptr|)\>|\<-?\d+[fdiu]?|'((\\.)?|[^'\\])'} 0:value
+addhl -group /cpp/code regex %{\<(this|true|false|NULL|nullptr|)\>|\<-?(0x[0-9a-fA-F]+|\d+)[fdiu]?|'((\\.)?|[^'\\])'} 0:value
 addhl -group /cpp/code regex "\<(void|int|char|unsigned|float|bool|size_t)\>" 0:type
 addhl -group /cpp/code regex "\<(while|for|if|else|do|switch|case|default|goto|break|continue|return|using|try|catch|throw|new|delete|and|and_eq|or|or_eq|not|operator|explicit|(?:reinterpret|const|static|dynamic)_cast|sizeof|alignof|alignas|decltype)\>" 0:keyword
 addhl -group /cpp/code regex "\<(const|constexpr|mutable|auto|namespace|inline|static|volatile|class|struct|enum|union|public|protected|private|template|typedef|virtual|friend|extern|typename|override|final)\>" 0:attribute