diff --git a/extkeys/mnemonic.go b/extkeys/mnemonic.go
index 1509d14b0..978923169 100644
--- a/extkeys/mnemonic.go
+++ b/extkeys/mnemonic.go
@@ -43,17 +43,13 @@ const (
 
 type entropyStrength int
 
+// Valid entropy strengths
 const (
-	// EntropyStrength128 defines an entropy strength of 128 bits
-	EntropyStrength128 = entropyStrength(128)
-	// EntropyStrength160 defines an entropy strength of 160 bits
-	EntropyStrength160 = entropyStrength(160)
-	// EntropyStrength192 defines an entropy strength of 192 bits
-	EntropyStrength192 = entropyStrength(192)
-	// EntropyStrength224 defines an entropy strength of 224 bits
-	EntropyStrength224 = entropyStrength(224)
-	// EntropyStrength256 defines an entropy strength of 256 bits
-	EntropyStrength256 = entropyStrength(256)
+	EntropyStrength128 entropyStrength = 128 + 32*iota
+	EntropyStrength160
+	EntropyStrength192
+	EntropyStrength224
+	EntropyStrength256
 )
 
 // Languages is a list of supported languages for which mnemonic keys can be generated