diff --git a/pkgs/development/libraries/libav/default.nix b/pkgs/development/libraries/libav/default.nix
index e0b4babc9709..6aa88a524c0e 100644
--- a/pkgs/development/libraries/libav/default.nix
+++ b/pkgs/development/libraries/libav/default.nix
@@ -27,7 +27,7 @@ let inherit (stdenv.lib) optional optionals hasPrefix; in
 let
   result = {
     libav_0_8 = libavFun "0.8.20" "0c7a2417c3a01eb74072691bb93ce802ae1be08f";
-    libav_11  = libavFun  "11.8"  "d0e93f6b229ae46c49d13ec183b13cfee70a51f0";
+    libav_11  = libavFun  "11.9"  "36ed1329099676ff3c970576e03c6a21f2da2e15";
     libav_12  = libavFun "12"     "4ecde7274621c82a6882b7614d907b28de25cc4e";
   };
 
@@ -41,7 +41,7 @@ let
 
     patches = []
       ++ optional (vpxSupport && hasPrefix "0.8." version) ./vpxenc-0.8.17-libvpx-1.5.patch
-      ++ optional (vpxSupport && hasPrefix "11."  version) ./vpxenc-11.6-libvpx-1.5.patch;
+      ;
 
     preConfigure = "patchShebangs doc/texi2pod.pl";
 
diff --git a/pkgs/development/libraries/libav/vpxenc-11.6-libvpx-1.5.patch b/pkgs/development/libraries/libav/vpxenc-11.6-libvpx-1.5.patch
deleted file mode 100644
index f3c52582b44e..000000000000
--- a/pkgs/development/libraries/libav/vpxenc-11.6-libvpx-1.5.patch
+++ /dev/null
@@ -1,22 +0,0 @@
---- a/libavcodec/libvpxenc.c	2016-05-01 17:53:17.974517377 +0200
-+++ b/libavcodec/libvpxenc.c	2016-05-01 17:54:30.564923297 +0200
-@@ -70,19 +70,11 @@
- 
- /** String mappings for enum vp8e_enc_control_id */
- static const char *const ctlidstr[] = {
--    [VP8E_UPD_ENTROPY]           = "VP8E_UPD_ENTROPY",
--    [VP8E_UPD_REFERENCE]         = "VP8E_UPD_REFERENCE",
--    [VP8E_USE_REFERENCE]         = "VP8E_USE_REFERENCE",
--    [VP8E_SET_ROI_MAP]           = "VP8E_SET_ROI_MAP",
--    [VP8E_SET_ACTIVEMAP]         = "VP8E_SET_ACTIVEMAP",
--    [VP8E_SET_SCALEMODE]         = "VP8E_SET_SCALEMODE",
-     [VP8E_SET_CPUUSED]           = "VP8E_SET_CPUUSED",
-     [VP8E_SET_ENABLEAUTOALTREF]  = "VP8E_SET_ENABLEAUTOALTREF",
-     [VP8E_SET_NOISE_SENSITIVITY] = "VP8E_SET_NOISE_SENSITIVITY",
--    [VP8E_SET_SHARPNESS]         = "VP8E_SET_SHARPNESS",
-     [VP8E_SET_STATIC_THRESHOLD]  = "VP8E_SET_STATIC_THRESHOLD",
-     [VP8E_SET_TOKEN_PARTITIONS]  = "VP8E_SET_TOKEN_PARTITIONS",
--    [VP8E_GET_LAST_QUANTIZER]    = "VP8E_GET_LAST_QUANTIZER",
-     [VP8E_SET_ARNR_MAXFRAMES]    = "VP8E_SET_ARNR_MAXFRAMES",
-     [VP8E_SET_ARNR_STRENGTH]     = "VP8E_SET_ARNR_STRENGTH",
-     [VP8E_SET_ARNR_TYPE]         = "VP8E_SET_ARNR_TYPE",