diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 173068a9c..3ca41d0c9 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -1,7 +1,7 @@
 name: cygwin
 
 concurrency:
-  group: cygwin-${{ github.head_ref }}
+  group: cygwin-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/file_format.yml b/.github/workflows/file_format.yml
index ea55f2b3e..348b8abf4 100644
--- a/.github/workflows/file_format.yml
+++ b/.github/workflows/file_format.yml
@@ -3,7 +3,7 @@ name: File format check
 on: [push, pull_request]
 
 concurrency:
-  group: file_fmt-${{ github.head_ref }}
+  group: file_fmt-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 permissions:
diff --git a/.github/workflows/images.yml b/.github/workflows/images.yml
index b7e9de3b0..b220104ab 100644
--- a/.github/workflows/images.yml
+++ b/.github/workflows/images.yml
@@ -1,7 +1,7 @@
 name: CI image builder
 
 concurrency:
-  group: img_builder-${{ github.head_ref }}
+  group: img_builder-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 90b4b97dc..da139241d 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,7 +1,7 @@
 name: Lint
 
 concurrency:
-  group: lint-${{ github.head_ref }}
+  group: lint-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index b6aa8434a..da77578e9 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -1,7 +1,7 @@
 name: macos
 
 concurrency:
-  group: macos-${{ github.head_ref }}
+  group: macos-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/msys2.yml b/.github/workflows/msys2.yml
index 32434d081..7e981f629 100644
--- a/.github/workflows/msys2.yml
+++ b/.github/workflows/msys2.yml
@@ -1,7 +1,7 @@
 name: msys2
 
 concurrency:
-  group: msys2-${{ github.head_ref }}
+  group: msys2-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/nonative.yml b/.github/workflows/nonative.yml
index 32754f818..1687d5ba9 100644
--- a/.github/workflows/nonative.yml
+++ b/.github/workflows/nonative.yml
@@ -1,7 +1,7 @@
 name: Cross-only compilation environment
 
 concurrency:
-  group: nonative-${{ github.head_ref }}
+  group: nonative-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/os_comp.yml b/.github/workflows/os_comp.yml
index f38c81a48..2d2e9b748 100644
--- a/.github/workflows/os_comp.yml
+++ b/.github/workflows/os_comp.yml
@@ -1,7 +1,7 @@
 name: linux
 
 concurrency:
-  group: linux-${{ github.head_ref }}
+  group: linux-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on:
diff --git a/.github/workflows/unusedargs_missingreturn.yml b/.github/workflows/unusedargs_missingreturn.yml
index 8118fb244..935d7ee60 100644
--- a/.github/workflows/unusedargs_missingreturn.yml
+++ b/.github/workflows/unusedargs_missingreturn.yml
@@ -10,7 +10,7 @@ env:
   FFLAGS: "-fimplicit-none"
 
 concurrency:
-  group: unusedargs-${{ github.head_ref }}
+  group: unusedargs-${{ github.head_ref || github.ref }}
   cancel-in-progress: true
 
 on: