diff --git a/nvm.sh b/nvm.sh
index e1ef5df..d6380cd 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -93,6 +93,7 @@ nvm_find_nvmrc() {
 
 # Obtain nvm version from rc file
 nvm_rc_version() {
+  export NVM_RC_VERSION=''
   local NVMRC_PATH
   NVMRC_PATH="$(nvm_find_nvmrc)"
   if [ -e "$NVMRC_PATH" ]; then