diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab2b6107e..f64e92b0b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -321,6 +321,8 @@ if (USE_SNDFILE)
       set(OPUS_LIBRARY opus CACHE STRING "Opus library" FORCE)
       add_subdirectory(extern/libogg EXCLUDE_FROM_ALL)
       add_subdirectory(extern/libvorbis EXCLUDE_FROM_ALL)
+      set(WITH_FORTIFY_SOURCE OFF CACHE BOOL "Enable Fortify Source" FORCE)
+      set(WITH_STACK_PROTECTOR OFF CACHE BOOL "Enable Fortify Source" FORCE)
       add_subdirectory(extern/flac EXCLUDE_FROM_ALL)
     endif()
 
diff --git a/extern/flac/CMakeLists.txt b/extern/flac/CMakeLists.txt
index 0ef0b6954..02849e715 100644
--- a/extern/flac/CMakeLists.txt
+++ b/extern/flac/CMakeLists.txt
@@ -14,8 +14,8 @@ option(BUILD_PROGRAMS "Build and install programs" OFF)
 option(BUILD_EXAMPLES "Build and install examples" OFF)
 option(BUILD_TESTING "Build tests" OFF)
 option(BUILD_DOCS "Build and install doxygen documents" OFF)
-option(WITH_FORTIFY_SOURCE "Enable protection against buffer overflows" ON)
-option(WITH_STACK_PROTECTOR "Enable GNU GCC stack smash protection" ON)
+option(WITH_FORTIFY_SOURCE "Enable protection against buffer overflows" OFF)
+option(WITH_STACK_PROTECTOR "Enable GNU GCC stack smash protection" OFF)
 option(INSTALL_MANPAGES "Install MAN pages" OFF)
 option(INSTALL_PKGCONFIG_MODULES "Install PkgConfig modules" OFF)
 option(INSTALL_CMAKE_CONFIG_MODULE "Install CMake package-config module" OFF)