diff --git a/llvm/utils/vim/syntax/llvm.vim b/llvm/utils/vim/syntax/llvm.vim
index e048caa20406a..cbff478d4bf09 100644
--- a/llvm/utils/vim/syntax/llvm.vim
+++ b/llvm/utils/vim/syntax/llvm.vim
@@ -220,7 +220,7 @@ syn keyword llvmError  getresult begin end
 syn match   llvmNoName /[%@!]\d\+\>/
 syn match   llvmNumber /-\?\<\d\+\>/
 syn match   llvmFloat  /-\?\<\d\+\.\d*\(e[+-]\d\+\)\?\>/
-syn match   llvmFloat  /\<0x[KLMHR]\?\x\+\>/
+syn match   llvmFloat  /\<\(u\|s\)\?0x[KLMHR]\?\x\+\>/
 syn keyword llvmBoolean true false
 syn keyword llvmConstant zeroinitializer undef null none poison vscale
 syn match   llvmComment /;.*$/