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-rw-r--r--Lisp/name-conversion.lisp3
1 files changed, 2 insertions, 1 deletions
diff --git a/Lisp/name-conversion.lisp b/Lisp/name-conversion.lisp
index 5f3b397..bec232b 100644
--- a/Lisp/name-conversion.lisp
+++ b/Lisp/name-conversion.lisp
@@ -60,7 +60,8 @@
(define-cached-function objc-class-name->symbol (class-name) class-name
- (let ((prefix-end (1- (position-if #'lower-case-p class-name))))
+ (let* ((prefix-end+1 (position-if #'lower-case-p class-name))
+ (prefix-end (and prefix-end+1 (1- prefix-end+1))))
(cond ((and prefix-end (> prefix-end 0))
;; There are n upper case chars at the head of the name.
;; Take the first (1- n) of them and downcase them. Then,