diff --git a/elb.el b/elb.el
index 4cd1d4c..af878e7 100644
--- a/elb.el
+++ b/elb.el
@@ -270,7 +270,7 @@ fn link_binary(c_files: [String], out_bin: String, runtime_path: String, out_dir
         let i = i + 1
     }
     let parts = native_list_append(parts, runtime_path)
-    let parts = native_list_append(parts, "-lcurl -lpthread")
+    let parts = native_list_append(parts, "-lcurl -lpthread -lm")
     let parts = native_list_append(parts, "-o " + out_bin)
     let cmd: String = str_join(parts, " ")
     println("  link     " + out_bin)