X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/c21235119a8ab47a55abcf94a83aace510edf5d7..43ac2ce5e55c134367e7a6c8eb8d2129df00c770:/src/src/expand.c

diff --git a/src/src/expand.c b/src/src/expand.c
index 7c9d48100..2c29c26d5 100644
--- a/src/src/expand.c
+++ b/src/src/expand.c
@@ -6186,11 +6186,12 @@ while (*s != 0)
         case 2:
         case 3: goto EXPAND_FAILED;
         }
-      for (uschar sep = *sub[0], c; c = *sub[1]; sub[1]++)
+      if (*sub[1]) for (uschar sep = *sub[0], c; c = *sub[1]; sub[1]++)
 	{
 	if (c == sep) yield = string_catn(yield, sub[1], 1);
 	yield = string_catn(yield, sub[1], 1);
 	}
+      else yield = string_catn(yield, US" ", 1);
       continue;
       }