diff --git a/options.c b/options.c
index 8681c21..635779d 100644
--- a/options.c
+++ b/options.c
@@ -2124,6 +2124,7 @@
 		.help	= "Percentage of mixed workload that is reads",
 		.def	= "50",
 		.interval = 5,
+		.inverse = "rwmixwrite",
 		.category = FIO_OPT_C_IO,
 		.group	= FIO_OPT_G_RWMIX,
 	},
@@ -2136,6 +2137,7 @@
 		.help	= "Percentage of mixed workload that is writes",
 		.def	= "50",
 		.interval = 5,
+		.inverse = "rwmixread",
 		.category = FIO_OPT_C_IO,
 		.group	= FIO_OPT_G_RWMIX,
 	},