diff -Naur ownCloud-3.2.0.10193.orig/src/CMakeLists.txt ownCloud-3.2.0.10193/src/CMakeLists.txt
--- ownCloud-3.2.0.10193.orig/src/CMakeLists.txt	2023-02-15 18:27:55.000000000 +0100
+++ ownCloud-3.2.0.10193/src/CMakeLists.txt	2023-02-22 22:55:29.352847663 +0100
@@ -16,12 +16,6 @@
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector-strong")
     endif()
   endif()
-
-  string(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LOWER)
-  if(CMAKE_BUILD_TYPE_LOWER MATCHES "(release|relwithdebinfo|minsizerel)")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_FORTIFY_SOURCE=2")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_FORTIFY_SOURCE=2")
-  endif()
 endif()
 
 if(WIN32)