diff --git a/syntax/include/arm_directives.vim b/syntax/include/arm_directives.vim
index 044cde0..e555aa6 100644
--- a/syntax/include/arm_directives.vim
+++ b/syntax/include/arm_directives.vim
@@ -17,6 +17,7 @@ syn keyword armDirective    .qn
 syn keyword armDirective    .setfp
 syn keyword armDirective    .secrel32
 syn keyword armDirective    .syntax
+syn keyword armDirective    .thumb
 syn keyword armDirective    .thumb_func
 syn keyword armDirective    .thumb_set
 syn keyword armDirective    .tlsdescseq