diff --git a/tk/listlogic.scm b/tk/listlogic.scm
index 73e83df..801db55 100644
--- a/tk/listlogic.scm
+++ b/tk/listlogic.scm
@@ -47,9 +47,13 @@
         (else (lp& eqv? ls1 ls2))))
 
 ;; Returns the argument if it isn't #f, otherwise returns the empty list
-(define (if-some $cond)
-  (if $cond $cond '()))
+(define-syntax if-some
+  (syntax-rules ()
+    ((if-some $cond)
+     (if $cond $cond '()))))
 
 ;; Returns the first argument if it isn't #f, otherwise returns the second.
-(define (if-some-else $cond $else)
-  (if $cond $cond $else))
+(define-syntax if-some-else
+  (syntax-rules ()
+    ((if-some-else $cond $else)
+     (if $cond $cond $else))))