diff --git a/src/cfgparse.c b/src/cfgparse.c
index 2123dd4c5..3421a0997 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -2066,11 +2066,17 @@ next_line:
 			}
 
 			for (check_arg = 0; check_arg < arg; check_arg++) {
-				if (*args[check_arg])
-					continue;
-				ha_warning("parsing [%s:%d]: argument number %d is empty and marks the end of the argument list; all subsequent arguments will be ignored.\n",
-					   file, linenum, check_arg + 1);
-				break;
+				if (!*args[check_arg]) {
+					/* if an empty arg was found, its pointer is in <errptr> */
+					size_t newpos;
+
+					/* sanitize input line in-place */
+					newpos = sanitize_for_printing(line, errptr - line, 80);
+					ha_warning("parsing [%s:%d]: argument number %d at position %d is empty and marks the end of the "
+						   "argument list; all subsequent arguments will be ignored:\n  %s\n  %*s\n",
+						   file, linenum, check_arg + 1, (int)(errptr - thisline + 1), line, (int)(newpos+1), "^");
+					break;
+				}
 			}
 
 			/* everything's OK */