diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2faf44162..3dd255359 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -131,13 +131,20 @@ target_include_directories(${PROJECT_NAME} PRIVATE ${LIBS_INCLUDE})
 if (USE_INCLUDED_LIBZIP)
     target_compile_options(${PROJECT_NAME} PRIVATE "-DZIP_STATIC")
     target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/Libraries/libzip/Include)
+    if(MSVC)
+      target_compile_definitions(${PROJECT_NAME} PRIVATE _CRT_SECURE_NO_WARNINGS)
+      target_compile_definitions(${PROJECT_NAME} PRIVATE _CRT_NONSTDC_NO_DEPRECATE)
+    endif()
     if(WIN32)
-      if(MSVC)
-        target_compile_definitions(${PROJECT_NAME} PRIVATE _CRT_SECURE_NO_WARNINGS)
-        target_compile_definitions(${PROJECT_NAME} PRIVATE _CRT_NONSTDC_NO_DEPRECATE)
-      endif()
       target_link_libraries(${PROJECT_NAME} PRIVATE advapi32)
     endif()
+    if (UNIX OR MINGW)
+      target_compile_options(${PROJECT_NAME} PRIVATE "-DHAVE_FSEEKO")
+      target_compile_options(${PROJECT_NAME} PRIVATE "-DHAVE_FTELLO")
+      target_compile_options(${PROJECT_NAME} PRIVATE "-DHAVE_STRCASECMP")
+      target_compile_options(${PROJECT_NAME} PRIVATE "-DHAVE_UNISTD_H")
+    endif()
+
 else()
     find_package(PkgConfig REQUIRED)
     pkg_check_modules(LIBZIP REQUIRED libzip)