diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6be6fe59f..8ac710731 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -149,6 +149,13 @@ if (USE_INCLUDED_LIBZIP)
     endif()
     target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/libzip)
 
+    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)