diff --git a/cmake/Modules/Findopm-parser.cmake b/cmake/Modules/Findopm-parser.cmake
index 79558089a..62c48b2b6 100644
--- a/cmake/Modules/Findopm-parser.cmake
+++ b/cmake/Modules/Findopm-parser.cmake
@@ -115,7 +115,7 @@ if (NOT CJSON_FOUND)
 endif ()
 
 # get the prerequisite Boost libraries
-find_package(Boost 1.44.0 COMPONENTS filesystem date_time system unit_test_framework ${OPM_PARSER_QUIET})
+find_package(Boost 1.44.0 COMPONENTS filesystem date_time system unit_test_framework regex ${OPM_PARSER_QUIET})
 
 if (CJSON_FOUND AND ERT_FOUND AND Boost_FOUND AND
     OPM_PARSER_LIBRARY AND OPM_JSON_LIBRARY AND OPM_PARSER_INCLUDE_DIR)