diff --git a/bash_completionsV2.go b/bash_completionsV2.go
index 70c0da51..87a90667 100644
--- a/bash_completionsV2.go
+++ b/bash_completionsV2.go
@@ -24,7 +24,7 @@ func genBashComp(buf io.StringWriter, name string, includeDesc bool) {
 
 __%[1]s_debug()
 {
-    if [[ -n ${BASH_COMP_DEBUG_FILE:-} ]]; then
+    if [[ -n ${BASH_COMP_DEBUG_FILE-} ]]; then
         echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
     fi
 }