diff --git a/llvm/utils/emacs/llvm-mode.el b/llvm/utils/emacs/llvm-mode.el
index f72fbcb3f94416ea5cc9baf2ac1b67ed795722f6..578257ab504754ce506ed3321c309adcb6439d53 100644
--- a/llvm/utils/emacs/llvm-mode.el
+++ b/llvm/utils/emacs/llvm-mode.el
@@ -34,7 +34,7 @@
    ;; Arithmetic and Logical Operators
    '("add\\|sub\\|mul\\|div\\|rem\\|and\\|or\\|xor\\|set\\(ne\\|eq\\|lt\\|gt\\|le\\|ge\\)" . font-lock-keyword-face)
    ;; Special instructions
-   '("phi\\|call\\|cast\\|shl\\|shr" . font-lock-keyword-face)
+   '("phi\\|call\\|cast\\|shl\\|shr\\|va_arg" . font-lock-keyword-face)
    ;; Control instructions
    '("ret\\|br\\|switch\\|invoke" . font-lock-keyword-face)
    ;; Memory operators
diff --git a/llvm/utils/vim/llvm.vim b/llvm/utils/vim/llvm.vim
index 578aeed7686e4aebd3d1b934b8c58c4a157cc302..dfdc43e7c4a5149d36e35ed90ec14a85eafc191b 100644
--- a/llvm/utils/vim/llvm.vim
+++ b/llvm/utils/vim/llvm.vim
@@ -20,7 +20,7 @@ syn keyword llvmStatement add sub mul div rem
 syn keyword llvmStatement and or xor
 syn keyword llvmStatement setne seteq setlt setgt setle setge
 
-syn keyword llvmStatement phi call cast shl shr
+syn keyword llvmStatement phi call cast shl shr va_arg
 syn keyword llvmStatement ret br switch invoke
 syn keyword llvmStatement malloc alloca free load store getelementptr