diff --git a/cmake/Modules/codegen.cmake b/cmake/Modules/codegen.cmake
index a284a4b..b805631 100644
--- a/cmake/Modules/codegen.cmake
+++ b/cmake/Modules/codegen.cmake
@@ -32,9 +32,9 @@ function(add_codegen_targets
         get_filename_component(CLANG_BIN_DIR "${CLANG_BIN_PATH}" DIRECTORY)
         find_library(CLANG_LIBRARY NAMES clang libclang HINTS "${CLANG_BIN_DIR}/../lib" REQUIRED)
     else()
-        find_library(CLANG_LIBRARY NAMES clang libclang REQUIRED)
+        find_library(CLANG_LIBRARY NAMES clang libclang PATHS /usr/lib/llvm-6.0/lib REQUIRED)
     endif()
-    if ("${CLANG_LIBRARY}" STREQUAL "CLANG_LIBRARY-NOTFOUND")
+    if (NOT CLANG_LIBRARY)
         message(SEND_ERROR "libclang not found")
         set(missing_requirements TRUE)
     endif()