--- a/ipc/chromium/src/build/build_config.h
+++ b/ipc/chromium/src/build/build_config.h
@@ -78,16 +78,19 @@
 #define ARCH_CPU_32_BITS 1
 #define WCHAR_T_IS_UNSIGNED 1
 #elif defined(__powerpc64__)
 #define ARCH_CPU_PPC64 1
 #define ARCH_CPU_64_BITS 1
 #elif defined(__ppc__) || defined(__powerpc__)
 #define ARCH_CPU_PPC 1
 #define ARCH_CPU_32_BITS 1
+#elif defined(__m68k__)
+#define ARCH_CPU_M68K 1
+#define ARCH_CPU_32_BITS 1
 #elif defined(__sparc__) && defined(__arch64__)
 #define ARCH_CPU_SPARC 1
 #define ARCH_CPU_64_BITS 1
 #elif defined(__sparc__)
 #define ARCH_CPU_SPARC 1
 #define ARCH_CPU_32_BITS 1
 #elif defined(__mips64) && defined(__LP64__)
 #define ARCH_CPU_MIPS 1