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-rw-r--r--Functions/Misc/zcalc2
1 files changed, 1 insertions, 1 deletions
diff --git a/Functions/Misc/zcalc b/Functions/Misc/zcalc
index 1f3392d92..6a56d4782 100644
--- a/Functions/Misc/zcalc
+++ b/Functions/Misc/zcalc
@@ -196,7 +196,7 @@ while (( expression_mode )) ||
   # special cases
   # Set default base if `[#16]' or `[##16]' etc. on its own.
   # Unset it if `[#]' or `[##]'.
-  if [[ $line = (#b)[[:blank:]]#('[#'(\#|)(<->|)']')[[:blank:]]#(*) ]]; then
+  if [[ $line = (#b)[[:blank:]]#('[#'(\#|)((<->|)(|_|_<->))']')[[:blank:]]#(*) ]]; then
     if [[ -z $match[4] ]]; then
       if [[ -z $match[3] ]]; then
 	defbase=