diff --git a/src/openalpr/support/CMakeLists.txt b/src/openalpr/support/CMakeLists.txt
index 8e4e30a..6ea731c 100644
--- a/src/openalpr/support/CMakeLists.txt
+++ b/src/openalpr/support/CMakeLists.txt
@@ -7,6 +7,8 @@ set(support_source_files
  platform.cpp
 )
 
+add_subdirectory(regex)
+
 add_library(support STATIC ${support_source_files})
 
 SET_TARGET_PROPERTIES( support PROPERTIES COMPILE_FLAGS -fPIC)
\ No newline at end of file