diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 727b2394a6..5877c54a26 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1431,6 +1431,8 @@ gcov:
     # Help gcovr process the nasty tricks in lib/dns/code.h, where we include C
     # source files from lib/dns/rdata/*/, using an even nastier trick.
     - find lib/dns/rdata/* -name "*.c" -execdir cp -f "{}" ../../ \;
+    # Help gcovr process inline function in the isc/hash.h
+    - cp -f lib/isc/include/isc/hash.h lib/dns/hash.h
     # Generate XML file in the Cobertura XML format suitable for use by GitLab
     # for the purpose of displaying code coverage information in the diff view
     # of a given merge request.