diff --git a/bin/pre.slime b/bin/pre.slime
index f838b97..fe6b0c5 100644
--- a/bin/pre.slime
+++ b/bin/pre.slime
@@ -1,8 +1,8 @@
-(define-syntax when (condition :rest body)
+(define-syntax (when condition :rest body)
   "Doc String for 'when'"
   `(if ,condition ,(pair prog body) nil))
 
-(define-syntax unless (condition :rest body)
+(define-syntax (unless condition :rest body)
   `(if ,condition nil ,(pair prog body)))
 
 ;; (define-syntax defun (name arguments :rest body)
@@ -116,11 +116,11 @@ the (rest) of the last element of the sequence."
 with (pair elem nil)."
   (extend seq (pair elem nil)))
 
-(define-syntax extend! (seq elem)
+(define-syntax (extend! seq elem)
   "test"
   `(mutate ,seq (extend ,seq ,elem)))
 
-(define-syntax append! (seq elem)
+(define-syntax (append! seq elem)
   `(mutate ,seq (append ,seq ,elem)))
 
 (define (length seq)
@@ -237,5 +237,5 @@ las argument."
 
   (eval (pair printf-quoted (extend (list :@sep (eval sep) :@end (eval end)) args))))
 
-(define-syntax pe (expr)
+(define-syntax (pe expr)
   `(printf ',expr "evaluates to" ,(eval expr)))