diff --git a/stdlib/stdlib.lsp b/stdlib/stdlib.lsp
index 0761c86..5e5ad0a 100644
--- a/stdlib/stdlib.lsp
+++ b/stdlib/stdlib.lsp
@@ -1,8 +1,8 @@
 ; not a bool
 (defn not (x) (if x nil #t))
 
-(defn is-pos? (n) (> n nil))
-(defn is-neg? (n) (< n nil))
+(defn is-pos? (n) (> n 0))
+(defn is-neg? (n) (< n 0))
 
 (defn neg (n) (- 0 n))
 (defn dec (n) (- n 1))