diff -up webkit-qtwebkit-23/Source/WTF/wtf/dtoa/utils.h.aarch64 webkit-qtwebkit-23/Source/WTF/wtf/dtoa/utils.h
--- webkit-qtwebkit-23/Source/WTF/wtf/dtoa/utils.h.aarch64	2014-02-28 13:01:16.157141081 -0600
+++ webkit-qtwebkit-23/Source/WTF/wtf/dtoa/utils.h	2014-02-28 13:07:09.189431851 -0600
@@ -49,7 +49,7 @@
 defined(__ARMEL__) || \
 defined(_MIPS_ARCH_MIPS32R2)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
-#elif CPU(MIPS) || CPU(PPC) || CPU(PPC64) || OS(WINCE) || CPU(SH4) || CPU(S390) || CPU(S390X) || CPU(IA64) || CPU(SPARC) || CPU(ALPHA)
+#elif CPU(MIPS) || CPU(PPC) || CPU(PPC64) || OS(WINCE) || CPU(SH4) || CPU(S390) || CPU(S390X) || CPU(IA64) || CPU(SPARC) || CPU(ALPHA) || CPU(AARCH64)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(_M_IX86) || defined(__i386__)
 #if defined(_WIN32)
diff -up webkit-qtwebkit-23/Source/WTF/wtf/Platform.h.aarch64 webkit-qtwebkit-23/Source/WTF/wtf/Platform.h
--- webkit-qtwebkit-23/Source/WTF/wtf/Platform.h.aarch64	2014-02-28 13:01:16.156141091 -0600
+++ webkit-qtwebkit-23/Source/WTF/wtf/Platform.h	2014-02-28 13:04:57.961813306 -0600
@@ -312,7 +312,16 @@
 
 #endif /* ARM */
 
-#if CPU(ARM) || CPU(MIPS) || CPU(SH4) || CPU(SPARC)
+/* CPU(AARCH64) - AArch64 */
+#if defined(__aarch64__)
+#define WTF_CPU_AARCH64 1
+#if defined(__AARCH64EB__)
+#define WTF_CPU_BIG_ENDIAN 1
+#endif
+#endif
+
+/* Not sure about this one, qt5-qtwebkit doesn't include it -- rex */
+#if CPU(ARM) || CPU(MIPS) || CPU(SH4) || CPU(SPARC) || CPU(AARCH64)
 #define WTF_CPU_NEEDS_ALIGNED_ACCESS 1
 #endif
 
@@ -874,7 +883,7 @@
     || CPU(ALPHA) \
     || CPU(SPARC64) \
     || CPU(S390X) \
-    || CPU(PPC64)
+    || CPU(PPC64) || CPU(AARCH64)
 #define WTF_USE_JSVALUE64 1
 #else
 #define WTF_USE_JSVALUE32_64 1