diff --git a/executable_semantics/syntax/BUILD b/executable_semantics/syntax/BUILD
index 7a2e2e021976..fd2d932c0616 100644
--- a/executable_semantics/syntax/BUILD
+++ b/executable_semantics/syntax/BUILD
@@ -62,8 +62,11 @@ cc_library(
         "//executable_semantics/ast:declaration",
         "//executable_semantics/ast:expression",
         "//executable_semantics/ast:paren_contents",
+        "//executable_semantics/ast:pattern",
         "//executable_semantics/common:arena",
         "//executable_semantics/common:error",
+        "//executable_semantics/common:nonnull",
+        "@llvm-project//llvm:Support",
     ],
 )