diff --git a/cmd_geo.go b/cmd_geo.go
index 29a92d5..6702e96 100644
--- a/cmd_geo.go
+++ b/cmd_geo.go
@@ -594,7 +594,7 @@ func withinRadius(members []ssElem, longitude, latitude, radius float64) []geoDi
 }
 
 func parseUnit(u string) float64 {
-	switch u {
+	switch strings.ToLower(u) {
 	case "m":
 		return 1
 	case "km":
diff --git a/cmd_geo_test.go b/cmd_geo_test.go
index 6d09c0d..d3ffd85 100644
--- a/cmd_geo_test.go
+++ b/cmd_geo_test.go
@@ -288,7 +288,7 @@ func TestGeodist(t *testing.T) {
 		)
 		mustDo(t, c,
 			"GEODIST", "Sicily", "Palermo", "Catania", "miles",
-			proto.Error("ERR unsupported unit provided. please use m, km, ft, mi"),
+			proto.Error("ERR unsupported unit provided. please use M, KM, FT, MI"),
 		)
 		mustDo(t, c,
 			"GEODIST", "Sicily", "Palermo", "Catania", "m", "too many",
diff --git a/integration/geo_test.go b/integration/geo_test.go
index 4ce87dd..ca8b863 100644
--- a/integration/geo_test.go
+++ b/integration/geo_test.go
@@ -103,6 +103,7 @@ func TestGeodist(t *testing.T) {
 		c.Do("GEODIST", "nosuch", "Catania", "Palermo")
 		c.DoRounded(2, "GEODIST", "Sicily", "Palermo", "Catania", "m")
 		c.Do("GEODIST", "Sicily", "Palermo", "Catania", "km")
+		c.Do("GEODIST", "Sicily", "Palermo", "Catania", "KM")
 		c.Do("GEODIST", "Sicily", "Palermo", "Catania", "mi")
 		c.DoRounded(2, "GEODIST", "Sicily", "Palermo", "Catania", "ft")
 		c.Do("GEODIST", "Sicily", "Palermo", "Palermo")
@@ -112,6 +113,7 @@ func TestGeodist(t *testing.T) {
 		c.Error("wrong number", "GEODIST", "Sicily")
 		c.Error("wrong number", "GEODIST", "Sicily", "Palermo")
 		c.Error("syntax error", "GEODIST", "Sicily", "Palermo", "Palermo", "miles", "too many")
+		c.Error("unsupported unit provided. please use M, KM, FT, MI", "GEODIST", "Sicily", "Palermo", "Catania", "foobar")
 		c.Do("SET", "string", "123")
 		c.Error("wrong kind", "GEODIST", "string", "a", "b")
 	})
@@ -128,6 +130,7 @@ func TestGeoradius(t *testing.T) {
 				"-73.98384899986625", "40.76172799961419", "50th St",
 			)
 			c.Do("GEORADIUS", "stations", "-73.9718893", "40.7728773", "4", "km")
+			c.Do("GEORADIUS", "stations", "-73.9718893", "40.7728773", "4", "KM")
 			c.Do("GEORADIUS", "stations", "1.0", "1.0", "1", "km")
 			c.Do("GEORADIUS", "stations", "-73.9718893", "40.7728773", "4", "ft", "WITHDIST")
 			c.Do("GEORADIUS", "stations", "-73.9718893", "40.7728773", "4", "m", "WITHDIST")
diff --git a/redis.go b/redis.go
index 2ccec39..5a21fe7 100644
--- a/redis.go
+++ b/redis.go
@@ -45,7 +45,7 @@ const (
 	msgStreamIDTooSmall     = "ERR The ID specified in XADD is equal or smaller than the target stream top item"
 	msgStreamIDZero         = "ERR The ID specified in XADD must be greater than 0-0"
 	msgNoScriptFound        = "NOSCRIPT No matching script. Please use EVAL."
-	msgUnsupportedUnit      = "ERR unsupported unit provided. please use m, km, ft, mi"
+	msgUnsupportedUnit      = "ERR unsupported unit provided. please use M, KM, FT, MI"
 	msgXreadUnbalanced      = "ERR Unbalanced 'xread' list of streams: for each stream key an ID or '$' must be specified."
 	msgXgroupKeyNotFound    = "ERR The XGROUP subcommand requires the key to exist. Note that for CREATE you may want to use the MKSTREAM option to create an empty stream automatically."
 	msgXtrimInvalidStrategy = "ERR unsupported XTRIM strategy. Please use MAXLEN, MINID"