diff --git a/js/src/vm/Opcodes.h b/js/src/vm/Opcodes.h
index e576dfd348f..2ef8726a703 100644
--- a/js/src/vm/Opcodes.h
+++ b/js/src/vm/Opcodes.h
@@ -286,7 +286,7 @@
     macro(JSOP_UNUSED52,  52, "unused52",   NULL,         1,  0,  0,  JOF_BYTE) \
     \
     macro(JSOP_GETPROP,   53, "getprop",    NULL,         5,  1,  1, JOF_ATOM|JOF_PROP|JOF_TYPESET|JOF_TMPSLOT3) \
-    macro(JSOP_SETPROP,   54, "setprop",    NULL,         5,  2,  1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING|JOF_TMPSLOT) \
+    macro(JSOP_SETPROP,   54, "setprop",    NULL,         5,  2,  1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \
     macro(JSOP_GETELEM,   55, "getelem",    NULL,         1,  2,  1, JOF_BYTE |JOF_ELEM|JOF_TYPESET|JOF_LEFTASSOC) \
     macro(JSOP_SETELEM,   56, "setelem",    NULL,         1,  3,  1, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING) \
     macro(JSOP_UNUSED57,  57, "unused57",   NULL,         1,  0,  0, JOF_BYTE) \