diff --git a/target-mips/cpu.h b/target-mips/cpu.h
index 4fec3cc88..3849e503c 100644
--- a/target-mips/cpu.h
+++ b/target-mips/cpu.h
@@ -12,7 +12,7 @@
 
 // uint_fast8_t and uint_fast16_t not in <sys/int_types.h>
 // XXX: move that elsewhere
-#if defined(HOST_SOLARIS) && SOLARISREV < 10
+#if defined(HOST_SOLARIS) && HOST_SOLARIS < 10
 typedef unsigned char           uint_fast8_t;
 typedef unsigned int            uint_fast16_t;
 #endif