diff --git a/extras/test/unit/coverage.sh b/extras/test/unit/coverage.sh
index f3606c67..50dc91bb 100755
--- a/extras/test/unit/coverage.sh
+++ b/extras/test/unit/coverage.sh
@@ -6,7 +6,7 @@ rm -rf $filename.*
 lcov --capture --directory build --output-file "${filename}.info"
 
 # filter out boost and C++ standard library
-lcov --remove "${filename}.info" "/usr/*/boost/*" "/usr/include/c++/*" --output-file "${filename}.info"
+lcov --remove "${filename}.info" "/usr/*/boost/*" "/usr/include/c++/*" --ignore-errors mismatch --output-file "${filename}.info"
 
 # generate HTML
 genhtml "${filename}.info" --output-directory "${filename}.report"