diff --git a/configure.in b/configure.in
index ecabb59e..d2b3fb69 100644
--- a/configure.in
+++ b/configure.in
@@ -221,7 +221,7 @@ AC_STRUCT_TM
 AC_C_CONST
 AC_C_INLINE
 AC_MSG_CHECKING([[for C99-conforming inline]])
-AC_COMPILE_IFELSE([[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 	int add(int change);
 
 	static int sum;
@@ -237,7 +237,7 @@ AC_COMPILE_IFELSE([[
 	sub(int change)
 	{
 		return add(-change);
-	}]],
+	}]])],
 	[AC_MSG_RESULT([[yes]])
 	 AC_DEFINE([NONSTATIC_INLINE], [inline],
 		[Define as inline if the compiler lets you declare a function without inline, then define it with inline, and have that definition refer to identifiers with internal linkage.  This is allowed by C99 6.7.4p6 and 6.7.4p3 together.  Otherwise define as nothing.])],