diff --git a/srcpkgs/dislocker/patches/fix-cflags.patch b/srcpkgs/dislocker/patches/fix-cflags.patch
new file mode 100644
index 0000000000..1229efeeaf
--- /dev/null
+++ b/srcpkgs/dislocker/patches/fix-cflags.patch
@@ -0,0 +1,13 @@
+Index: src/CMakeLists.txt
+===================================================================
+--- src/CMakeLists.txt.orig
++++ src/CMakeLists.txt
+@@ -71,7 +71,7 @@ if(NOT DEFINED WARN_FLAGS)
+ 	set (WARN_FLAGS "-Wall -Wextra" CACHE STRING "" FORCE)
+ endif()
+ if(NOT DEFINED HARDEN_FLAGS)
+-	set (HARDEN_FLAGS "-fstack-protector -fstrict-aliasing -D_FORTIFY_SOURCE=2 -O1" CACHE STRING "" FORCE)
++	set (HARDEN_FLAGS "-fstack-protector -fstrict-aliasing" CACHE STRING "" FORCE)
+ endif()
+ 
+ set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")