diff --git a/build-missing-xlocale-h.patch b/build-missing-xlocale-h.patch
deleted file mode 100644
index b4a62b2..0000000
--- a/build-missing-xlocale-h.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -up thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp.xlocale thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp
---- thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp.xlocale	2017-08-24 14:42:48.634084293 +0200
-+++ thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp	2017-08-24 14:42:50.534084676 +0200
-@@ -64,7 +64,7 @@
- # if U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_CYGWIN
- #   include <locale.h>
- # else
--#   include <xlocale.h>
-+#   include <locale.h>
- # endif
- #endif
- 
diff --git a/firefox.spec b/firefox.spec
index 89cd65e..3157127 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -127,7 +127,6 @@ Patch27:        mozilla-1335250.patch
 Patch29:        build-big-endian.patch
 Patch32:        build-rust-ppc64le.patch
 Patch35:        build-ppc-jit.patch
-Patch36:        build-missing-xlocale-h.patch
 # Always feel lucky for unsupported platforms:
 # https://bugzilla.mozilla.org/show_bug.cgi?id=1347128
 Patch37:        build-jit-atomic-always-lucky.patch
@@ -320,7 +319,6 @@ This package contains results of tests executed during build.
 # Patch for big endian platforms only
 %if 0%{?big_endian}
 %patch26 -p1 -b .icu
-%patch36 -p2 -b .xlocale
 %endif
 
 %{__rm} -f .mozconfig