diff --git a/.github/workflows/compliance.yml b/.github/workflows/compliance.yml
index d778ee429d..9f2bec2896 100644
--- a/.github/workflows/compliance.yml
+++ b/.github/workflows/compliance.yml
@@ -30,6 +30,7 @@ jobs:
           ERR=1 \
           TARGET=${{ matrix.TARGET }} \
           CC=${{ matrix.CC }} \
+          DEBUG=-DDEBUG_STRICT=1 \
           USE_OPENSSL=1
         sudo make install
     - name: Show HAProxy version
diff --git a/.github/workflows/vtest.yml b/.github/workflows/vtest.yml
index 4d6fdfb607..6d42db8fff 100644
--- a/.github/workflows/vtest.yml
+++ b/.github/workflows/vtest.yml
@@ -85,6 +85,7 @@ jobs:
           ERR=1 \
           TARGET=${{ matrix.TARGET }} \
           CC=${{ matrix.CC }} \
+          DEBUG=-DDEBUG_STRICT=1 \
           ${{ join(matrix.FLAGS, ' ') }} \
           ADDLIB="-Wl,-rpath,/usr/local/lib/ -Wl,-rpath,$HOME/opt/lib/"
         sudo make install
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 5393a4c3ac..b5a198aff4 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -52,6 +52,7 @@ jobs:
           ERR=1 \
           TARGET=${{ matrix.TARGET }} \
           CC=${{ matrix.CC }} \
+          DEBUG=-DDEBUG_STRICT=1 \
           ${{ join(matrix.FLAGS, ' ') }}
     - name: Show HAProxy version
       id: show-version