diff --git a/js/src/Makefile.in b/js/src/Makefile.in
index f0953a2f9ff3..87984986de04 100644
--- a/js/src/Makefile.in
+++ b/js/src/Makefile.in
@@ -334,10 +334,7 @@ check-jstests:
 #
 #   Bug 652155: On Mac, SM(d) doesn't work for unknown reasons
 
-ifeq ($(OS_ARCH),WINNT)
-ifdef ENABLE_METHODJIT
-endif
-else
+ifneq ($(OS_ARCH),WINNT)
 ifndef HAVE_DTRACE
 #check:: check-jstests
 endif
diff --git a/js/src/configure.in b/js/src/configure.in
index 6c4527233f6d..032784a7942c 100644
--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -2067,41 +2067,25 @@ dnl Configure JIT support
 
 case "$target" in
 i?86-*)
-    ENABLE_METHODJIT=1
     ENABLE_ION=1
-    ENABLE_MONOIC=1
-    ENABLE_POLYIC=1
-    ENABLE_METHODJIT_TYPED_ARRAY=1
     ENABLE_YARR_JIT=1
     AC_DEFINE(JS_CPU_X86)
     AC_DEFINE(JS_NUNBOX32)
     ;;
 x86_64*-*)
-    ENABLE_METHODJIT=1
     ENABLE_ION=1
-    ENABLE_MONOIC=1
-    ENABLE_POLYIC=1
-    ENABLE_METHODJIT_TYPED_ARRAY=1
     ENABLE_YARR_JIT=1
     AC_DEFINE(JS_CPU_X64)
     AC_DEFINE(JS_PUNBOX64)
     ;;
 arm*-*)
-    ENABLE_METHODJIT=1
     ENABLE_ION=1
-    ENABLE_MONOIC=1
-    ENABLE_POLYIC=1
-    ENABLE_METHODJIT_TYPED_ARRAY=1
     ENABLE_YARR_JIT=1
     AC_DEFINE(JS_CPU_ARM)
     AC_DEFINE(JS_NUNBOX32)
     ;;
 sparc*-*)
     if test ! "$HAVE_64BIT_OS" ; then
-    ENABLE_METHODJIT=1
-    ENABLE_MONOIC=1
-    ENABLE_POLYIC=1
-    ENABLE_METHODJIT_TYPED_ARRAY=1
     ENABLE_YARR_JIT=1
 dnl ENABLE_ION=0
     AC_DEFINE(JS_CPU_SPARC)
@@ -2109,10 +2093,6 @@ dnl ENABLE_ION=0
     fi
     ;;
 mips*-*)
-    ENABLE_METHODJIT=1
-    ENABLE_MONOIC=1
-    ENABLE_POLYIC=1
-    ENABLE_METHODJIT_TYPED_ARRAY=1
     ENABLE_YARR_JIT=1
     AC_DEFINE(JS_CPU_MIPS)
     AC_DEFINE(JS_NUNBOX32)
@@ -2127,27 +2107,8 @@ MOZ_ARG_DISABLE_BOOL(yarr-jit,
 [  --disable-yarr-jit    Disable YARR JIT support],
   ENABLE_YARR_JIT= )
 
-AC_SUBST(ENABLE_METHODJIT)
 AC_SUBST(ENABLE_METHODJIT_SPEW)
 
-if test "$ENABLE_METHODJIT"; then
-    AC_DEFINE(JS_METHODJIT)
-else
-    ENABLE_ION=
-fi
-
-if test "$ENABLE_MONOIC"; then
-    AC_DEFINE(JS_MONOIC)
-fi
-
-if test "$ENABLE_POLYIC"; then
-    AC_DEFINE(JS_POLYIC)
-fi
-
-if test "$ENABLE_METHODJIT_TYPED_ARRAY"; then
-    AC_DEFINE(JS_METHODJIT_TYPED_ARRAY)
-fi
-
 AC_SUBST(ENABLE_ION)
 
 if test "$ENABLE_ION"; then
@@ -3278,7 +3239,7 @@ MOZ_ARG_ENABLE_STRING(debug,
                            (using compiler flags DBG)],
 [ if test "$enableval" != "no"; then
     MOZ_DEBUG=1
-    if test "$ENABLE_METHODJIT" -o "$ENABLE_YARR_JIT"; then
+    if test "$ENABLE_YARR_JIT"; then
          # needs MethodJIT or YarrJIT
          ENABLE_METHODJIT_SPEW=1
     fi
diff --git a/js/src/ion/Registers.h b/js/src/ion/Registers.h
index b60e587f3d69..ef8ec9cf0213 100644
--- a/js/src/ion/Registers.h
+++ b/js/src/ion/Registers.h
@@ -19,7 +19,7 @@
 #include "ion/FixedArityList.h"
 
 // ARM defines the RegisterID within Architecture-arm.h
-#if !defined(JS_CPU_ARM) && defined(JS_METHODJIT)
+#if !defined(JS_CPU_ARM)
 #include "assembler/assembler/MacroAssembler.h"
 #endif
 
diff --git a/js/src/js-config.h.in b/js/src/js-config.h.in
index 6c5b7d60296b..b6053e9a305a 100644
--- a/js/src/js-config.h.in
+++ b/js/src/js-config.h.in
@@ -38,10 +38,6 @@
    JS_HAVE_STDINT_H.  */
 #undef JS_BYTES_PER_WORD
 
-/* Some mozilla code uses JS-friend APIs that depend on JS_METHODJIT being
-   correct. */
-#undef JS_METHODJIT
-
 /* MOZILLA JSAPI version number components */
 #undef MOZJS_MAJOR_VERSION
 #undef MOZJS_MINOR_VERSION