Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1186,10 +1186,11 @@
 			;;
 		*)
 			AC_CHECK_TYPE(off64_t, [
 				AC_DEFINE(OF_HAVE_OFF64_T, 1,
 					[Whether we have off64_t])
+				AC_CHECK_FUNCS([lseek64 lstat64 open64 stat64])
 			])
 			;;
 	esac
 
 	AC_CHECK_HEADERS([pwd.h grp.h])

Index: src/OFFile.m
==================================================================
--- src/OFFile.m
+++ src/OFFile.m
@@ -221,11 +221,11 @@
 		flags |= O_BINARY | O_CLOEXEC;
 
 # if defined(OF_WINDOWS)
 		if ((handle = _wopen(path.UTF16String, flags,
 		    _S_IREAD | _S_IWRITE)) == -1)
-# elif defined(OF_HAVE_OFF64_T)
+# elif defined(HAVE_OPEN64)
 		if ((handle = open64([path cStringWithEncoding:
 		    [OFLocale encoding]], flags, 0666)) == -1)
 # else
 		if ((handle = open([path cStringWithEncoding:
 		    [OFLocale encoding]], flags, 0666)) == -1)
@@ -464,11 +464,11 @@
 		@throw [OFNotOpenException exceptionWithObject: self];
 
 #ifndef OF_AMIGAOS
 # if defined(OF_WINDOWS)
 	ret = _lseeki64(_handle, offset, whence);
-# elif defined(OF_HAVE_OFF64_T)
+# elif defined(HAVE_LSEEK64)
 	ret = lseek64(_handle, offset, whence);
 # else
 	ret = lseek(_handle, offset, whence);
 # endif
 

Index: src/OFFileURLHandler.m
==================================================================
--- src/OFFileURLHandler.m
+++ src/OFFileURLHandler.m
@@ -87,11 +87,11 @@
 #  define HAVE_STRUCT_STAT_ST_BIRTHTIME
 	of_time_interval_t st_birthtime;
 	DWORD fileAttributes;
 # endif
 } of_stat_t;
-#elif defined(OF_HAVE_OFF64_T)
+#elif defined(HAVE_STAT64)
 typedef struct stat64 of_stat_t;
 #else
 typedef struct stat of_stat_t;
 #endif
 
@@ -272,11 +272,11 @@
 # ifdef OF_AMIGAOS4
 	FreeDosObject(DOS_EXAMINEDATA, ed);
 # endif
 
 	return 0;
-#elif defined(OF_HAVE_OFF64_T)
+#elif defined(HAVE_STAT64)
 	return stat64([path cStringWithEncoding: [OFLocale encoding]], buffer);
 #else
 	return stat([path cStringWithEncoding: [OFLocale encoding]], buffer);
 #endif
 }
@@ -284,11 +284,11 @@
 static int
 of_lstat(OFString *path, of_stat_t *buffer)
 {
 #if defined(HAVE_LSTAT) && !defined(OF_WINDOWS) && !defined(OF_AMIGAOS) && \
     !defined(OF_NINTENDO_3DS) && !defined(OF_WII)
-# ifdef OF_HAVE_OFF64_T
+# ifdef HAVE_LSTAT64
 	return lstat64([path cStringWithEncoding: [OFLocale encoding]], buffer);
 # else
 	return lstat([path cStringWithEncoding: [OFLocale encoding]], buffer);
 # endif
 #else