diff --git a/pkgs/tools/networking/ssmtp/default.nix b/pkgs/tools/networking/ssmtp/default.nix
index 22f60bfcee5..ebe31dc8b5a 100644
--- a/pkgs/tools/networking/ssmtp/default.nix
+++ b/pkgs/tools/networking/ssmtp/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, tlsSupport ? false, openssl ? null}:
+{stdenv, fetchurl, tlsSupport ? true, openssl ? null}:
 
 assert tlsSupport -> openssl != null;
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9fdb03560d0..bee9676158b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5551,9 +5551,7 @@ in
 
   sslmate = callPackage ../development/tools/sslmate { };
 
-  ssmtp = callPackage ../tools/networking/ssmtp {
-    tlsSupport = true;
-  };
+  ssmtp = callPackage ../tools/networking/ssmtp { };
 
   ssocr = callPackage ../applications/misc/ssocr { };