diff --git a/pkgs/applications/editors/emacs/macport-24.5.nix b/pkgs/applications/editors/emacs/macport-24.5.nix
index 885538dc883..8a33155d62b 100644
--- a/pkgs/applications/editors/emacs/macport-24.5.nix
+++ b/pkgs/applications/editors/emacs/macport-24.5.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     "--enable-mac-app=$$out/Applications"
   ];
 
-  CFLAGS = "-O3 -DMAC_OS_X_VERSION_MAX_ALLOWED=1090";
+  CFLAGS = "-O3 -DMAC_OS_X_VERSION_MAX_ALLOWED=1090 -DMAC_OS_X_VERSION_MIN_REQUIRED=1090";
   LDFLAGS = "-O3 -L${ncurses.out}/lib";
 
   postInstall = ''
diff --git a/pkgs/applications/editors/emacs/macport-25.1.nix b/pkgs/applications/editors/emacs/macport-25.1.nix
index 81e77c725d9..84d1950b865 100644
--- a/pkgs/applications/editors/emacs/macport-25.1.nix
+++ b/pkgs/applications/editors/emacs/macport-25.1.nix
@@ -5,7 +5,7 @@
 
 stdenv.mkDerivation rec {
   emacsName = "emacs-25.1";
-  name = "${emacsName}-mac-6.0";
+  name = "${emacsName}-mac-6.1";
 
   builder = ./builder.sh;
 
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   macportSrc = fetchurl {
     url = "ftp://ftp.math.s.chiba-u.ac.jp/emacs/${name}.tar.gz";
-    sha256 = "2f7a3fd826e6dea541ada04f4a1ff2903a87a1f736b89c5b90bf7bb820568e34";
+    sha256 = "1zwxh7zsvwcg221mpjh0dhpdas3j9mc5q92pprf8yljl7clqvg62";
   };
 
   enableParallelBuilding = true;
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     "--enable-mac-app=$$out/Applications"
   ];
 
-  CFLAGS = "-O3 -DMAC_OS_X_VERSION_MAX_ALLOWED=1090";
+  CFLAGS = "-O3 -DMAC_OS_X_VERSION_MAX_ALLOWED=1090 -DMAC_OS_X_VERSION_MIN_REQUIRED=1090";
   LDFLAGS = "-O3 -L${ncurses.out}/lib";
 
   postInstall = ''