diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9d3edba..a571ed5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,8 +2,6 @@ cmake_minimum_required(VERSION 3.16.0)
 
 project(picasso LANGUAGES C CXX ASM HOMEPAGE_URL https://onecoolx.github.io/picasso/)
 
-set(BUILD_SHARED_LIBS ON) # build shared library, OFF for static
-
 set(PROJECT_ROOT ${CMAKE_CURRENT_LIST_DIR})
 set(PROJECT_OUT ${CMAKE_CURRENT_BINARY_DIR})
 
@@ -13,7 +11,6 @@ set(VERSION_MICRO 0)
 set(VERSION_INFO ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_MICRO})
 
 option(BUILD_SHARED_LIBS "Build shared libraries (default)" ON)
-option(BUILD_STATIC_LIBS "Build static libraries" OFF)
 
 option(OPT_FORMAT_ABGR "Pixel format ABGR support." ON)
 option(OPT_FORMAT_ARGB "Pixel format ARGB support." ON)
@@ -34,22 +31,10 @@ option(OPT_EXTENSIONS "Build extension libraries." ON)
 
 option(OPT_TESTS "Build test apps" ON)
 option(OPT_DEMOS "Build example demos" ON)
-option(OPT_UNITTEST "Build Unit tests" OFF)
+option(OPT_UNITTEST "Build unit tests" OFF)
 
 if (NOT CMAKE_BUILD_TYPE)
-	set(CMAKE_BUILD_TYPE Debug CACHE STRING "Build Type" FORCE)
-endif()
-
-if (NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
-  set(BUILD_STATIC_LIBS ON)
-endif()
-
-if (BUILD_SHARED_LIBS)
-  set(BUILD_SHARED_LIBS ON)
-endif()
-
-if (BUILD_STATIC_LIBS)
-  set(BUILD_STATIC_LIBS ON)
+  set(CMAKE_BUILD_TYPE Debug CACHE STRING "Build type" FORCE)
 endif()
 
 include (${CMAKE_CURRENT_LIST_DIR}/build/configs.cmake)
diff --git a/build/defines.cmake b/build/defines.cmake
index 3ab8d0d..88384c6 100644
--- a/build/defines.cmake
+++ b/build/defines.cmake
@@ -5,7 +5,9 @@
 
 if (WIN32)
     add_compile_definitions(WIN32)
-    add_compile_definitions(DLL_EXPORT)
+    if (BUILD_SHARED_LIBS)
+        add_compile_definitions(DLL_EXPORT)
+    endif()
     add_compile_definitions(ENABLE_FAST_COPY=1)
     add_compile_definitions(ENABLE_SYSTEM_MALLOC=1)
     add_compile_definitions(__SSE2__=1)
diff --git a/src/src.cmake b/src/src.cmake
index 9b1cff9..23f16bc 100644
--- a/src/src.cmake
+++ b/src/src.cmake
@@ -30,7 +30,13 @@ elseif (APPLE)
 endif()
 
 add_definitions(-DEXPORT)
-add_library(${LIB_NAME} ${SOURCES})
+if (BUILD_SHARED_LIBS)
+  set(BUILD_LIBS_TYPE SHARED)
+else()
+  set(BUILD_LIBS_TYPE STATIC)
+endif()
+
+add_library(${LIB_NAME} ${BUILD_LIBS_TYPE} ${SOURCES})
 install(TARGETS ${LIB_NAME} LIBRARY DESTINATION lib ARCHIVE DESTINATION lib RUNTIME DESTINATION bin)
 
 if (UNIX AND NOT APPLE)