diff --git a/libs/wpp/ppl.l b/libs/wpp/ppl.l
index 990fbb1..409706e 100644
--- a/libs/wpp/ppl.l
+++ b/libs/wpp/ppl.l
@@ -156,6 +156,7 @@
 ul	[uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
 
 %{
+#include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -823,7 +824,7 @@
 	if(is_ll)
 	{
 /* Assume as in the declaration of wrc_ull_t and wrc_sll_t */
-#if defined(SIZEOF_LONGLONG) && SIZEOF_LONGLONG >= 8
+#ifdef HAVE_LONG_LONG
 		if (is_u)
 		{
 			val->ull = strtoull(str, NULL, radix);
diff --git a/libs/wpp/wpp_private.h b/libs/wpp/wpp_private.h
index fe60f65..d8a752a 100644
--- a/libs/wpp/wpp_private.h
+++ b/libs/wpp/wpp_private.h
@@ -20,6 +20,10 @@
 #ifndef __WINE_WPP_PRIVATE_H
 #define __WINE_WPP_PRIVATE_H
 
+#ifndef __WINE_CONFIG_H
+# error You must include config.h to use this header
+#endif
+
 #include <stdio.h>
 #include <string.h>
 
@@ -133,14 +137,16 @@
 
 
 /*
- * I assume that 'long long' exists in the compiler when it has a size
- * of 8 or bigger. If not, then we revert to a simple 'long' for now.
+ * If the configure says we have long long then we can use it.  Presumably
+ * if we have long long then we have strtoull and strtoll too.  If that is
+ * not the case we will need to add to the configure tests.
+ * If we do not have long long , then we revert to a simple 'long' for now.
  * This should prevent most unexpected things with other compilers than
  * gcc and egcs for now.
  * In the future it should be possible to use another way, like a
  * structure, so that we can emulate the MS compiler.
  */
-#if defined(SIZEOF_LONGLONG) && SIZEOF_LONGLONG >= 8
+#ifdef HAVE_LONG_LONG
 typedef long long wrc_sll_t;
 typedef unsigned long long wrc_ull_t;
 #else