diff --git a/nvm.sh b/nvm.sh
index a782441..78a37cf 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -158,7 +158,11 @@ nvm_ls() {
       VERSIONS="$PATTERN"
     fi
   else
-    VERSIONS=`find "$NVM_DIR/" -maxdepth 1 -type d -name "$(nvm_format_version $PATTERN)*" -exec basename '{}' ';' \
+    PATTERN=$(nvm_format_version $PATTERN)
+    if [ `expr "$PATTERN" : "v[[:digit:]]*\.[[:digit:]]*$"` != 0 ]; then
+      PATTERN="$PATTERN."
+    fi
+    VERSIONS=`find "$NVM_DIR/" -maxdepth 1 -type d -name "$PATTERN*" -exec basename '{}' ';' \
       | sort -t. -u -k 1.2,1n -k 2,2n -k 3,3n | \grep -v '^ *\.'`
   fi
   if [ -z "$VERSIONS" ]; then