diff --git a/pkgs/applications/editors/emacs-24/at-fdcwd.patch b/pkgs/applications/editors/emacs-24/at-fdcwd.patch
index 1f99d4e18094..2d8099b73736 100644
--- a/pkgs/applications/editors/emacs-24/at-fdcwd.patch
+++ b/pkgs/applications/editors/emacs-24/at-fdcwd.patch
@@ -1,12 +1,14 @@
 diff --git a/lib/careadlinkat.h b/lib/careadlinkat.h
-index 5cdb813..7a272e8 100644
+index 84ede3e..8e8f42e 100644
 --- a/lib/careadlinkat.h
 +++ b/lib/careadlinkat.h
-@@ -23,6 +23,8 @@
+@@ -23,6 +23,10 @@
  #include <fcntl.h>
  #include <unistd.h>
  
++#ifndef AT_FDCWD
 +#define AT_FDCWD -2
++#endif
 +
  struct allocator;
  
diff --git a/pkgs/applications/editors/emacs-25/at-fdcwd.patch b/pkgs/applications/editors/emacs-25/at-fdcwd.patch
index 1f99d4e18094..2d8099b73736 100644
--- a/pkgs/applications/editors/emacs-25/at-fdcwd.patch
+++ b/pkgs/applications/editors/emacs-25/at-fdcwd.patch
@@ -1,12 +1,14 @@
 diff --git a/lib/careadlinkat.h b/lib/careadlinkat.h
-index 5cdb813..7a272e8 100644
+index 84ede3e..8e8f42e 100644
 --- a/lib/careadlinkat.h
 +++ b/lib/careadlinkat.h
-@@ -23,6 +23,8 @@
+@@ -23,6 +23,10 @@
  #include <fcntl.h>
  #include <unistd.h>
  
++#ifndef AT_FDCWD
 +#define AT_FDCWD -2
++#endif
 +
  struct allocator;