diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 17304e9ab0c9f84579295c352beef043ccf93afa..b66fb58119adf2ce59b9c4f01aa06bb366a783dc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,6 +8,26 @@ before_script: &before
   - duneci-install-module https://git.imp.fu-berlin.de/agnumpde/dune-fufem.git
   - duneci-install-module https://git.imp.fu-berlin.de/agnumpde/dune-elasticity.git
 
+# ADOLC's comparison operators return `int` instead of `bool` which confuses
+# template meta-programming in dune-common...
+.patch-dune-common: &patch-dune-common
+  - |-
+    patch -d /duneci/modules/dune-common -p1 <<EOT
+    diff --git a/dune/common/densematrix.hh b/dune/common/densematrix.hh
+    index b03bbb0b..917ecef9 100644
+    --- a/dune/common/densematrix.hh
+    +++ b/dune/common/densematrix.hh
+    @@ -897,7 +897,7 @@ namespace Dune
+             for (size_type k=i+1; k<A.rows(); k++)
+             {
+               auto abs = fvmeta::absreal(A[k][i]);
+    -          auto mask = abs > pivmax;
+    +          bool mask = abs > pivmax;
+               pivmax = Simd::cond(mask, abs, pivmax);
+               imax   = Simd::cond(mask, simd_index_type(k), imax);
+             }
+    EOT
+
 dune:2.6 gcc:
   image: duneci/dune:2.6-debian-10-gcc-8-17
   script: duneci-standard-test
@@ -22,15 +42,22 @@ dune:2.6 clang:
 
 dune:git gcc:
   image: duneci/dune:git-debian-10-gcc-8-17
+  before_script:
+  - *patch-dune-common
+  - *before
   script: duneci-standard-test
 
 dune:git clang:
   image: duneci/dune:git-debian-10-clang-7-libcpp-17
+  before_script:
+  - *patch-dune-common
+  - *before
   script: duneci-standard-test
 
 dune:git parmg gcc:
   image: duneci/dune:git-debian-10-gcc-8-17
   before_script:
+  - *patch-dune-common
   - *before
   - duneci-install-module https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.mn.tu-dresden.de/paraphase/dune-parmg.git
   script: duneci-standard-test
@@ -38,6 +65,7 @@ dune:git parmg gcc:
 dune:git parmg clang:
   image: duneci/dune:git-debian-10-clang-7-libcpp-17
   before_script:
+  - *patch-dune-common
   - *before
   - duneci-install-module https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.mn.tu-dresden.de/paraphase/dune-parmg.git
   script: duneci-standard-test