diff --git a/src/nvm.go b/src/nvm.go
index e6c99ae..18ad5b9 100644
--- a/src/nvm.go
+++ b/src/nvm.go
@@ -206,7 +206,7 @@ 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)