diff --git a/js/src/assembler/assembler/X86Assembler.h b/js/src/assembler/assembler/X86Assembler.h
index b641326196c..9ae094e4c03 100644
--- a/js/src/assembler/assembler/X86Assembler.h
+++ b/js/src/assembler/assembler/X86Assembler.h
@@ -1077,13 +1077,17 @@ public:
 
     void cmpq_rm(RegisterID src, int offset, RegisterID base)
     {
-        FIXME_INSN_PRINTING;
+        js::JaegerSpew(js::JSpew_Insns,
+                       IPFX "cmpq       %s, %d(%s)\n", MAYBE_PAD,
+                       nameIReg(8, src), offset, nameIReg(8, base));
         m_formatter.oneByteOp64(OP_CMP_EvGv, src, base, offset);
     }
 
     void cmpq_mr(int offset, RegisterID base, RegisterID src)
     {
-        FIXME_INSN_PRINTING;
+        js::JaegerSpew(js::JSpew_Insns,
+                       IPFX "cmpq       %d(%s), %s\n", MAYBE_PAD,
+                       offset, nameIReg(8, base), nameIReg(8, src));
         m_formatter.oneByteOp64(OP_CMP_GvEv, src, base, offset);
     }