diff --git a/Source/JavaScriptCore/CMakeLists.txt b/Source/JavaScriptCore/CMakeLists.txt
index 6e39c6e..07130ec 100644
--- a/Source/JavaScriptCore/CMakeLists.txt
+++ b/Source/JavaScriptCore/CMakeLists.txt
@@ -263,5 +263,5 @@ ENDIF ()
 
 IF (SHARED_CORE)
     SET_TARGET_PROPERTIES(${JavaScriptCore_LIBRARY_NAME} PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
-    INSTALL(TARGETS ${JavaScriptCore_LIBRARY_NAME} DESTINATION lib)
+    INSTALL(TARGETS ${JavaScriptCore_LIBRARY_NAME} DESTINATION "lib${LIB_SUFFIX}")
 ENDIF ()
diff --git a/Source/JavaScriptCore/wtf/CMakeLists.txt b/Source/JavaScriptCore/wtf/CMakeLists.txt
index dcaeeb3..8765eea 100644
--- a/Source/JavaScriptCore/wtf/CMakeLists.txt
+++ b/Source/JavaScriptCore/wtf/CMakeLists.txt
@@ -230,5 +230,5 @@ ENDIF ()
 
 IF (SHARED_CORE)
     SET_TARGET_PROPERTIES(${WTF_LIBRARY_NAME} PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
-    INSTALL(TARGETS ${WTF_LIBRARY_NAME} DESTINATION lib)
+    INSTALL(TARGETS ${WTF_LIBRARY_NAME} DESTINATION "lib${LIB_SUFFIX}")
 ENDIF ()
diff --git a/Source/WebCore/CMakeLists.txt b/Source/WebCore/CMakeLists.txt
index 593e493..4f304b5 100644
--- a/Source/WebCore/CMakeLists.txt
+++ b/Source/WebCore/CMakeLists.txt
@@ -2387,5 +2387,5 @@ ENDIF ()
 
 IF (SHARED_CORE)
     SET_TARGET_PROPERTIES(${WebCore_LIBRARY_NAME} PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
-    INSTALL(TARGETS ${WebCore_LIBRARY_NAME} DESTINATION lib)
+    INSTALL(TARGETS ${WebCore_LIBRARY_NAME} DESTINATION "lib${LIB_SUFFIX}")
 ENDIF ()
diff --git a/Source/WebKit/CMakeLists.txt b/Source/WebKit/CMakeLists.txt
index 24566c4..af0417a 100644
--- a/Source/WebKit/CMakeLists.txt
+++ b/Source/WebKit/CMakeLists.txt
@@ -81,4 +81,4 @@ IF (VERSION_SCRIPT)
 ENDIF ()
 
 SET_TARGET_PROPERTIES(${WebKit_LIBRARY_NAME} PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
-INSTALL(TARGETS ${WebKit_LIBRARY_NAME} DESTINATION lib)
+INSTALL(TARGETS ${WebKit_LIBRARY_NAME} DESTINATION "lib${LIB_SUFFIX}")
diff --git a/Source/cmake/OptionsCommon.cmake b/Source/cmake/OptionsCommon.cmake
index 27a5e82..be5a1a4 100644
--- a/Source/cmake/OptionsCommon.cmake
+++ b/Source/cmake/OptionsCommon.cmake
@@ -14,3 +14,5 @@ ENDIF ()
 IF (ENABLE_WEBGL)
     FIND_PACKAGE(OpenGL REQUIRED)
 ENDIF ()
+
+SET(LIB_SUFFIX "" CACHE STRING "Define suffix of directory name (32/64)")