diff --git a/ChangeLog b/ChangeLog
index f0f855a3..cb8b22d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2015-06-20  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>
 
+	* configure.ac: For 64-bit MinGW, fix SSIZE_FORMAT formatting
+	specifier.  64-bit MinGW supports 'long long' but support for
+	'lld' is not assured by the run-time DLLs.
+
 	* test/raw_decode.c (XMD_H): Avoid conflicting typedefs for INT32
 	and boolean in MinGW build due to including jpeglib.h.
 
diff --git a/configure b/configure
index ef72e024..290eaddd 100755
--- a/configure
+++ b/configure
@@ -17692,7 +17692,15 @@ then
 elif test $ac_cv_sizeof_signed_long_long -eq $ac_cv_sizeof_unsigned_char_p
 then
   SSIZE_T='signed long long'
-  SSIZE_FORMAT='"%lld"'
+  case "${host_os}" in
+    mingw32*)
+      # MinGW32 understands 'long long', but uses printf from WIN32 CRT
+      SSIZE_FORMAT='"%I64d"'
+      ;;
+    *)
+      SSIZE_FORMAT='"%lld"'
+      ;;
+  esac
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SSIZE_T" >&5
 $as_echo "$SSIZE_T" >&6; }
diff --git a/configure.ac b/configure.ac
index 608d41e0..7dd42e3d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -332,7 +332,15 @@ then
 elif test $ac_cv_sizeof_signed_long_long -eq $ac_cv_sizeof_unsigned_char_p
 then
   SSIZE_T='signed long long'
-  SSIZE_FORMAT='"%lld"'
+  case "${host_os}" in
+    mingw32*)
+      # MinGW32 understands 'long long', but uses printf from WIN32 CRT
+      SSIZE_FORMAT='"%I64d"'
+      ;;
+    *)
+      SSIZE_FORMAT='"%lld"'
+      ;;
+  esac
 fi
 AC_MSG_RESULT($SSIZE_T)
 AC_DEFINE_UNQUOTED(TIFF_SSIZE_T,$SSIZE_T,[Signed size type])