diff --git a/configure.ac b/configure.ac
index 52673a4..db9a005 100644
--- a/configure.ac
+++ b/configure.ac
@@ -226,7 +226,6 @@ dnl ----------------------------------------------
 dnl check functions
 dnl ----------------------------------------------
 dnl malloc_trim function
-#AC_CHECK_FUNCS(malloc_trim, , )
 AC_CHECK_FUNCS([malloc_trim])
 
 dnl ----------------------------------------------