diff --git a/coverage-tool/coverage-reporting/merge.py b/coverage-tool/coverage-reporting/merge.py
index bb07b10f020ba53ae5a589b6278447e933f03473..933f6de57234dc0a03762afd7a9ac9f561c91117 100755
--- a/coverage-tool/coverage-reporting/merge.py
+++ b/coverage-tool/coverage-reporting/merge.py
@@ -197,7 +197,7 @@ if options.json_file and len(options.json_file):
 # Exploit LCOV merging capabilities
 # Example of LCOV usage: lcov -rc lcov_branch_coverage=1 -a coverage_1.info \
 # -a coverage_2.info -o coverage_merge.info
-command = ['lcov', '-rc', 'lcov_branch_coverage=1']
+command = ['lcov', '--rc', 'lcov_branch_coverage=1']
 
 for file_name in info_files_to_merge:
     command.append('-a')