diff --git a/src/configure.in b/src/configure.in
index e06ed5a91af..ea495621059 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -573,10 +573,10 @@ main() {
 	AC_MSG_RESULT(no),
 	AC_MSG_RESULT(assuming not on target machine))
 
-AC_MSG_CHECKING(whether 'long long int' is 64 bits using %Ld)
+AC_MSG_CHECKING(whether 'long long int' is 64 bits using %lld)
 AC_TRY_RUN([#include <stdio.h>
 typedef long long int int64;
-#define INT64_FORMAT "%Ld"
+#define INT64_FORMAT "%lld"
 
 int64 a = 20000001;
 int64 b = 40000005;
@@ -606,7 +606,7 @@ int does_int64_work()
 main() {
   exit(! does_int64_work());
 }],
-	[AC_DEFINE(HAVE_LONG_LONG_INT_64_Ld) AC_MSG_RESULT(yes)],
+	[AC_DEFINE(HAVE_LONG_LONG_INT_64_lld) AC_MSG_RESULT(yes)],
 	AC_MSG_RESULT(no),
 	AC_MSG_RESULT(assuming not on target machine))
 
diff --git a/src/include/utils/int8.h b/src/include/utils/int8.h
index 5767edbd9d6..24177bee82b 100644
--- a/src/include/utils/int8.h
+++ b/src/include/utils/int8.h
@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: int8.h,v 1.5 1998/09/10 03:27:09 momjian Exp $
+ * $Id: int8.h,v 1.6 1998/09/10 05:36:00 momjian Exp $
  *
  * NOTES
  * These data types are supported on all 64-bit architectures, and may
@@ -29,11 +29,11 @@ typedef long int int64;
 
 #define INT64_FORMAT "%ld"
 #else
-#ifdef HAVE_LONG_LONG_INT_64_Ld
+#ifdef HAVE_LONG_LONG_INT_64_lld
 /* We have working support for "long long int", use that */
 typedef long long int int64;
 
-#define INT64_FORMAT "%Ld"
+#define INT64_FORMAT "%lld"
 #else
 #ifdef HAVE_LONG_LONG_INT_64_qd
 /* We have working support for "long long int", use that */