diff --git a/testing/firefox/checksums b/testing/firefox/checksums
index 340d479f..5c080a70 100644
--- a/testing/firefox/checksums
+++ b/testing/firefox/checksums
@@ -7,5 +7,5 @@ b5e70b12cc9dd18fffd7924a7d3a2e11574136fe0764359d08eba0755f1c5d4c  mozconfig
 b19aaae7fc45db643f8d2540d96919c745ea341e36d9aea2df40e3e90eb951f0  fix-toolkit.patch
 e24f71a6a0d8d4637b2081780c66b01be4eeb4dd496031270d0ae0b898be94d2  fix-tools.patch
 5e0fcfde375837074baad21a8ab26aa442a7940617ebd074a6b238a48f2ceb63  fix-webrtc-glibcisms.patch
-800965f5071d6f84ca99382f1ffd41b0683e3e9e704acbd415923a8b2d209761  fix-bug-1261392.patch
+3e415de9a028c72833aaf58f72b5bf078bffcc3478fd50754998346154016afa  fix-bug-1261392.patch
 1d4a8f110d34da478f5597727eda9acacebd443dd86cce5bb64f898c01feabce  mallinfo.patch
diff --git a/testing/firefox/patches/fix-bug-1261392.patch b/testing/firefox/patches/fix-bug-1261392.patch
index fa40914d..64064113 100644
--- a/testing/firefox/patches/fix-bug-1261392.patch
+++ b/testing/firefox/patches/fix-bug-1261392.patch
@@ -1,25 +1,17 @@
---- a/tools/profiler/core/platform.h	2017-05-27 11:44:06.733119794 +0000
-+++ b/tools/profiler/core/platform.h	2017-05-27 11:46:16.004253520 +0000
-@@ -54,10 +54,11 @@
- #include <vector>
- #include "StackTop.h"
- 
--// We need a definition of gettid(), but old glibc versions don't provide a
--// wrapper for it.
+diff --git a/tools/profiler/core/platform-linux-android.cpp b/tools/profiler/core/platform-linux-android.cpp
+index 07857f2..92e693c 100644
+--- a/tools/profiler/core/platform-linux-android.cpp
++++ b/tools/profiler/core/platform-linux-android.cpp
+@@ -72,12 +72,7 @@ using namespace mozilla;
+ int profiler_current_process_id() { return getpid(); }
+
+ int profiler_current_thread_id() {
+-  // glibc doesn't provide a wrapper for gettid().
 -#if defined(__GLIBC__)
-+// We need a definition of gettid(), but Linux libc implementations don't
-+// provide a wrapper for it (except for Bionic)
-+#if defined(__linux__)
- #  include <unistd.h>
-+#if !defined(__BIONIC__)
- #  include <sys/syscall.h>
- #  define gettid() static_cast<pid_t>(syscall(SYS_gettid))
-+#endif
-@@ -71,6 +72,7 @@
-   return (pid_t) syscall(SYS_thread_selfid);
+   return static_cast<int>(static_cast<pid_t>(syscall(SYS_gettid)));
+-#else
+-  return static_cast<int>(gettid());
+-#endif
  }
- #endif
-+#endif
- 
- #ifdef XP_WIN
- #include <windows.h>
+
+ void* GetStackTop(void* aGuess) { return aGuess; }