diff --git a/CMakeLists.txt b/CMakeLists.txt
index b412dc7..5ca7fa8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -147,10 +147,12 @@ if(MINGW)
     set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
 endif(MINGW)
 
-add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
-add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
-set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
-set_target_properties(zlib PROPERTIES SOVERSION 1)
+add_library(zlib ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+if (BUILD_SHARED_LIBS)
+    target_sources(zlib PRIVATE ${ZLIB_DLL_SRCS})
+    set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
+    set_target_properties(zlib PROPERTIES SOVERSION 1)
+endif()
 
 if(NOT CYGWIN)
     # This property causes shared libraries on Linux to have the full version
@@ -165,7 +167,7 @@ endif()
 
 if(UNIX)
     # On unix-like platforms the library is almost always called libz
-   set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
+   set_target_properties(zlib PROPERTIES OUTPUT_NAME z)
    if(NOT APPLE)
      set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
    endif()
@@ -175,7 +177,7 @@ elseif(BUILD_SHARED_LIBS AND WIN32)
 endif()
 
 if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
-    install(TARGETS zlib zlibstatic
+    install(TARGETS zlib
         RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
         ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
         LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )