4 files changed, 7 insertions, 7 deletions
diff --git a/modules/by-name/lf/lf/ctpv/helpers.sh b/modules/by-name/lf/lf/ctpv/helpers.sh
index 6dc7fee6..30e4483a 100644
--- a/modules/by-name/lf/lf/ctpv/helpers.sh
+++ b/modules/by-name/lf/lf/ctpv/helpers.sh
@@ -59,7 +59,7 @@ preview_xxd() {
     # This has been derived mathematically.
     octet_columns=$(((2 * w - 22) / 7))
 
-    if [ -n "$CTPV_LESS_PREVIEWER" ]; then
+    if [ "${CTPV_LESS_PREVIEWER:-unset}" != "-unset" ]; then
         __base_xxd_preview "$1"
     else
         __base_xxd_preview "$1" -len "$((h * octet_columns))"
diff --git a/modules/by-name/lf/lf/ctpv/prev/any.sh b/modules/by-name/lf/lf/ctpv/prev/any.sh
index 0b0ee573..7ce72dcd 100644
--- a/modules/by-name/lf/lf/ctpv/prev/any.sh
+++ b/modules/by-name/lf/lf/ctpv/prev/any.sh
@@ -5,9 +5,9 @@ f="$f"
 # shellcheck disable=SC2269
 w="$w"
 # shellcheck disable=SC2269
-e="$e"
+e="${e:-[missing extension]}"
 # shellcheck disable=SC2269
-m="$m"
+m="${m:-[missing mime type]}"
 # shellcheck disable=SC2269
 h="$h"
 
diff --git a/modules/by-name/lf/lf/ctpv/prev/application/dll/dll.sh b/modules/by-name/lf/lf/ctpv/prev/application/dll/dll.sh
index e365fe0a..5237ecec 100644
--- a/modules/by-name/lf/lf/ctpv/prev/application/dll/dll.sh
+++ b/modules/by-name/lf/lf/ctpv/prev/application/dll/dll.sh
@@ -5,9 +5,9 @@ f="$f"
 # shellcheck disable=SC2269
 w="$w"
 # shellcheck disable=SC2269
-e="$e"
+e="${e:-[missing extension]}"
 # shellcheck disable=SC2269
-m="$m"
+m="${m:-[missing mime type]}"
 # shellcheck disable=SC2269
 h="$h"
 
diff --git a/modules/by-name/lf/lf/ctpv/prev/application/epub/epub.sh b/modules/by-name/lf/lf/ctpv/prev/application/epub/epub.sh
index cad95860..3bec0dd1 100644
--- a/modules/by-name/lf/lf/ctpv/prev/application/epub/epub.sh
+++ b/modules/by-name/lf/lf/ctpv/prev/application/epub/epub.sh
@@ -5,9 +5,9 @@ f="$f"
 # shellcheck disable=SC2269
 w="$w"
 # shellcheck disable=SC2269
-e="$e"
+e="${e:-[missing extension]}"
 # shellcheck disable=SC2269
-m="$m"
+m="${m:-[missing mime type]}"
 # shellcheck disable=SC2269
 h="$h"
 # shellcheck disable=SC2269