diff --git a/debian/clang-tools-X.Y.install.in b/debian/clang-tools-X.Y.install.in
index 076f7eb1..a06d334b 100644
--- a/debian/clang-tools-X.Y.install.in
+++ b/debian/clang-tools-X.Y.install.in
@@ -25,6 +25,7 @@ usr/lib/llvm-@LLVM_VERSION@/bin/clangd
 usr/lib/llvm-@LLVM_VERSION@/bin/clang-refactor
 usr/lib/llvm-@LLVM_VERSION@/bin/diagtool
 usr/lib/llvm-@LLVM_VERSION@/bin/hmaptool
+usr/lib/llvm-@LLVM_VERSION@/bin/clang-extdef-mapping
 
 tools/clang/tools/scan-build-@LLVM_VERSION@      usr/share/clang/
 tools/clang/tools/scan-build-py-@LLVM_VERSION@      usr/share/clang/
@@ -53,3 +54,4 @@ usr/bin/clangd-@LLVM_VERSION@
 usr/bin/clang-refactor-@LLVM_VERSION@
 usr/bin/diagtool-@LLVM_VERSION@
 usr/bin/hmaptool-@LLVM_VERSION@
+usr/bin/clang-extdef-mapping-@LLVM_VERSION@