diff --git a/pkgs/tools/networking/ucspi-tcp/default.nix b/pkgs/tools/networking/ucspi-tcp/default.nix
index 0bcd35b21ef959..fc46c6a15bc51d 100644
--- a/pkgs/tools/networking/ucspi-tcp/default.nix
+++ b/pkgs/tools/networking/ucspi-tcp/default.nix
@@ -14,6 +14,7 @@ stdenv.mkDerivation rec {
       url = "http://ftp.de.debian.org/debian/pool/main/u/ucspi-tcp/ucspi-tcp_0.88-3.diff.gz";
       sha256 = "0mzmhz8hjkrs0khmkzs5i0s1kgmgaqz07h493bd5jj5fm5njxln6";
     })
+    ./remove-setuid.patch
   ];
 
   # Apply Debian patches
diff --git a/pkgs/tools/networking/ucspi-tcp/remove-setuid.patch b/pkgs/tools/networking/ucspi-tcp/remove-setuid.patch
new file mode 100644
index 00000000000000..dd693320804630
--- /dev/null
+++ b/pkgs/tools/networking/ucspi-tcp/remove-setuid.patch
@@ -0,0 +1,15 @@
+diff --git a/hier.c b/hier.c
+index 5663ada..1d73b84 100644
+--- a/hier.c
++++ b/hier.c
+@@ -2,8 +2,8 @@
+ 
+ void hier()
+ {
+-  h(auto_home,-1,-1,02755);
+-  d(auto_home,"bin",-1,-1,02755);
++  h(auto_home,-1,-1,0755);
++  d(auto_home,"bin",-1,-1,0755);
+ 
+   c(auto_home,"bin","tcpserver",-1,-1,0755);
+   c(auto_home,"bin","tcprules",-1,-1,0755);