diff --git a/sources/shiboken2/CMakeLists.txt b/sources/shiboken2/CMakeLists.txt
index 1af84fc..843761f 100644
--- a/sources/shiboken2/CMakeLists.txt
+++ b/sources/shiboken2/CMakeLists.txt
@@ -104,7 +104,8 @@ if(MSVC)
     set(CLANG_LIB_NAMES libclang)
 endif()
 
-find_library(CLANG_LIBRARY NAMES ${CLANG_LIB_NAMES} HINTS ${CLANG_DIR}/lib)
+set(LIB_SUFFIX "64" CACHE STRING "Define suffix of directory name (32/64)" )
+find_library(CLANG_LIBRARY NAMES ${CLANG_LIB_NAMES} HINTS ${CLANG_DIR}/lib${LIB_SUFFIX})
 if (NOT EXISTS ${CLANG_LIBRARY})
     string(REPLACE ";" ", " CLANG_LIB_NAMES_STRING "${CLANG_LIB_NAMES}")
     message(FATAL_ERROR "Unable to find the Clang library in ${CLANG_DIR}.\
@@ -311,7 +312,6 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D QT_NO_CAST_FROM_ASCII -D QT_NO_CAST_T
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-set(LIB_SUFFIX "" CACHE STRING "Define suffix of directory name (32/64)" )
 set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" CACHE PATH "The subdirectory relative to the install prefix where libraries will be installed (default is /lib${LIB_SUFFIX})" FORCE)
 
 if (WIN32)
diff --git a/sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp b/sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp
index 74cad05..ff02e6d 100644
--- a/sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp
+++ b/sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp
@@ -268,7 +268,7 @@ static QString findClangBuiltInIncludesDir()
     if (!clangPath.isEmpty()) {
         QString candidate;
         QVersionNumber lastVersionNumber(1, 0, 0);
-        QDir clangDir(clangPath + QLatin1String("/lib/clang"));
+        QDir clangDir(clangPath + QLatin1String("/lib64/clang"));
         const QFileInfoList versionDirs =
             clangDir.entryInfoList(QDir::Dirs | QDir::NoDotAndDotDot);
         for (const QFileInfo &fi : versionDirs) {