diff --git a/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn b/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn
index b412840cc9792..44e239ef1e85e 100644
--- a/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/tools/clang-extdef-mapping/BUILD.gn
@@ -10,6 +10,9 @@ executable("clang-extdef-mapping") {
     "//llvm/lib/AsmParser",
     "//llvm/lib/MC",
     "//llvm/lib/Support",
+    "//llvm/lib/Target:AllTargetsAsmParsers",
+    "//llvm/lib/Target:AllTargetsDescs",
+    "//llvm/lib/Target:AllTargetsInfos",
   ]
   sources = [ "ClangExtDefMapGen.cpp" ]
 }