`bash_completion`: Reduce startup time
diff --git a/bash_completion b/bash_completion
index 989dde7..47eda3e 100644
--- a/bash_completion
+++ b/bash_completion
@@ -2,7 +2,7 @@
 
 # bash completion for Node Version Manager (NVM)
 
-if ! nvm &> /dev/null; then
+if ! command -v nvm &> /dev/null; then
     return
 fi