diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index adbb36c5..3fa9fa65 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1064,6 +1064,18 @@ R:
   lexer: S
   primary_extension: .r
 
+REALbasic:
+  type: programming
+  lexer: VB.net
+  primary_extension: .rbbas
+  extensions:
+  - .rbfrm
+  - .rbmnu
+  - .rbres
+  - .rbtbar
+  - .rbuistate
+
+
 RHTML:
   type: markup
   group: HTML