--- CMakeLists.txt.orig	2018-10-14 18:01:08 UTC
+++ CMakeLists.txt
@@ -73,6 +73,8 @@ elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "ppc"
     set(WTF_CPU_PPC 1)
 elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64")
     set(WTF_CPU_PPC64 1)
+elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "powerpc64")
+    set(WTF_CPU_PPC64 1)
 elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64le")
     set(WTF_CPU_PPC64LE 1)
 elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "parisc*")
