diff --git a/target/mips/mips-defs.h b/target/mips/mips-defs.h
index 6b8e680011..b7879be9e9 100644
--- a/target/mips/mips-defs.h
+++ b/target/mips/mips-defs.h
@@ -61,7 +61,6 @@
 #define CPU_MIPS4       (CPU_MIPS3 | ISA_MIPS4)
 #define CPU_MIPS5       (CPU_MIPS4 | ISA_MIPS5)
 #define CPU_VR54XX      (CPU_MIPS4 | INSN_VR54XX)
-#define CPU_R5900       (CPU_MIPS3 | INSN_R5900)
 #define CPU_LOONGSON2E  (CPU_MIPS3 | INSN_LOONGSON2E)
 #define CPU_LOONGSON2F  (CPU_MIPS3 | INSN_LOONGSON2F | ASE_LMMI)