diff --git a/.clang-format-ignore b/.clang-format-ignore
index 4b7b414bb9..ae3fd2306b 100644
--- a/.clang-format-ignore
+++ b/.clang-format-ignore
@@ -1,3 +1,7 @@
-# exclude third party code from clang-format checks
+# Exclude third party code from clang-format checks.
+#
+# This file is used by the clang-format-lint-action on Github.
+# When updating this list, remember to update Jamulus.pro's CLANG_SOURCES
+# as well.
 ./libs
 ./windows/nsProcess
diff --git a/.github/workflows/coding-style-check.yml b/.github/workflows/coding-style-check.yml
index 26ab8fadad..5e85c2d19d 100644
--- a/.github/workflows/coding-style-check.yml
+++ b/.github/workflows/coding-style-check.yml
@@ -17,4 +17,6 @@ jobs:
     - uses: DoozyX/clang-format-lint-action@2a28e3a8d9553f244243f7e1ff94f6685dff87be
       with:
         clangFormatVersion: 10
+        # When updating the extension list, remember to update
+        # Jamulus.pro's CLANG_SOURCES as well.
         extensions: 'cpp,h'
diff --git a/Jamulus.pro b/Jamulus.pro
index 169c8a5b0c..3e595decfb 100644
--- a/Jamulus.pro
+++ b/Jamulus.pro
@@ -1169,3 +1169,10 @@ contains(CONFIG, "disable_version_check") {
 
 ANDROID_ABIS = armeabi-v7a arm64-v8a x86 x86_64
 
+# Enable formatting all code via `make clang_format`.
+# Note: When extending the list of file extensions or when changing the excludes,
+# be sure to update .github/workflows/coding-style-check.yml and .clang-format-ignore as well.
+CLANG_SOURCES = $$files(*.cpp, true) $$files(*.h, true)
+CLANG_SOURCES ~= s!^\(libs/|moc_|ui_|windows/nsProcess/|src/res/qrc_resources\.cpp\)\S*$!!g
+clang_format.commands = 'clang-format -i $$CLANG_SOURCES'
+QMAKE_EXTRA_TARGETS += clang_format