diff --git a/src/nvm.go b/src/nvm.go
index d243ea2..653881c 100644
--- a/src/nvm.go
+++ b/src/nvm.go
@@ -219,7 +219,7 @@ func install(version string, cpuarch string) {
 
 	// if the user specifies only the major version number then install the latest
 	// version of the major version number
-	if len(version) == 1 {
+	if !strings.Contains(version, ".") {
 		version = findLatestSubVersion(version)
 	} else {
 		version = cleanVersion(version)