diff --git a/configure b/configure
index 0c74530..c57343d 100755
--- a/configure
+++ b/configure
@@ -614,6 +614,8 @@ PKG_CONFIG_LIBDIR
 PKG_CONFIG_PATH
 PKG_CONFIG
 SDL2_FRAMEWORK
+HAS_OFF64T_FALSE
+HAS_OFF64T_TRUE
 USE_ALSA_FALSE
 USE_ALSA_TRUE
 USE_NETWORKING_FALSE
@@ -1571,48 +1573,6 @@ fi
 
 } # ac_fn_cxx_try_compile
 
-# ac_fn_c_try_run LINENO
-# ----------------------
-# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
-# that executables *can* be run.
-ac_fn_c_try_run ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_link") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
-  { { case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: program exited with status $ac_status" >&5
-       $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-       ac_retval=$ac_status
-fi
-  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_run
-
 # ac_fn_c_try_link LINENO
 # -----------------------
 # Try to link conftest.$ac_ext, and return whether this succeeded.
@@ -1658,6 +1618,48 @@ fi
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_link
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: program exited with status $ac_status" >&5
+       $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -4201,6 +4203,30 @@ else
 fi
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for off64_t" >&5
+$as_echo_n "checking for off64_t... " >&6; }
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+int
+main ()
+{
+off64_t n=0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  has_lfs="yes"
+else
+  has_lfs="no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $has_lfs" >&5
+$as_echo "$has_lfs" >&6; }
+
 #AC_MSG_CHECKING([for libz])
 #AX_CHECK_ZLIB
 
@@ -4229,6 +4255,15 @@ else
 fi
 
 
+ if test "$has_lfs" = "yes"; then
+  HAS_OFF64T_TRUE=
+  HAS_OFF64T_FALSE='#'
+else
+  HAS_OFF64T_TRUE='#'
+  HAS_OFF64T_FALSE=
+fi
+
+
 SDL_VERSION=2.0.1
 
 
@@ -4351,7 +4386,6 @@ $as_echo "no" >&6; }
 	fi
 fi
 
-
 # Check whether --with-sdl-prefix was given.
 if test "${with_sdl_prefix+set}" = set; then :
   withval=$with_sdl_prefix; sdl_prefix="$withval"
@@ -5571,6 +5605,10 @@ if test -z "${USE_ALSA_TRUE}" && test -z "${USE_ALSA_FALSE}"; then
   as_fn_error $? "conditional \"USE_ALSA\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${HAS_OFF64T_TRUE}" && test -z "${HAS_OFF64T_FALSE}"; then
+  as_fn_error $? "conditional \"HAS_OFF64T\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${OS_LINUX_TRUE}" && test -z "${OS_LINUX_FALSE}"; then
   as_fn_error $? "conditional \"OS_LINUX\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
diff --git a/configure.ac b/configure.ac
index 3e4688e..30b88bc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,6 +60,10 @@ esac
 AM_CONDITIONAL(CPU_I386, test "$CPU" = "i386")
 AM_CONDITIONAL(CPU_X86_64, test "$CPU" = "x86_64")
 
+AC_MSG_CHECKING([for off64_t])
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],[[off64_t n=0;]])],[has_lfs="yes"],[has_lfs="no"])
+AC_MSG_RESULT($has_lfs)
+
 #AC_MSG_CHECKING([for libz])
 #AX_CHECK_ZLIB
 
@@ -67,6 +71,8 @@ AM_CONDITIONAL(USE_WX, test "$enable_wx" = "yes")
 AM_CONDITIONAL(USE_NETWORKING, test "$enable_networking" = "yes")
 AM_CONDITIONAL(USE_ALSA, test "$enable_alsa" = "yes")
 
+AM_CONDITIONAL(HAS_OFF64T, test "$has_lfs" = "yes")
+
 SDL_VERSION=2.0.1
 AM_PATH_SDL2($SDL_VERSION,
    :,
diff --git a/src/Makefile.am b/src/Makefile.am
index 98df3b8..eccce04 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -77,4 +77,8 @@ endif
 
 if OS_LINUX
 pcem_SOURCES += cdrom-ioctl-linux.c
+endif
+
+if !HAS_OFF64T
+pcem_CFLAGS += -Doff64_t=off_t -Dfopen64=fopen -Dfseeko64=fseek -Dftello64=ftell
 endif
\ No newline at end of file
diff --git a/src/Makefile.in b/src/Makefile.in
index ff1b6be..221de07 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -106,6 +106,7 @@ bin_PROGRAMS = pcem$(EXEEXT)
 @OS_MACOSX_TRUE@am__append_12 = -DPCEM_RENDER_WITH_TIMER -DPCEM_RENDER_TIMER_LOOP
 @OS_MACOSX_TRUE@am__append_13 = -DPCEM_RENDER_WITH_TIMER -DPCEM_RENDER_TIMER_LOOP
 @OS_LINUX_TRUE@am__append_14 = cdrom-ioctl-linux.c
+@HAS_OFF64T_FALSE@am__append_15 = -Doff64_t=off_t -Dfopen64=fopen -Dfseeko64=fseek -Dftello64=ftell
 subdir = src
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/configure.ac
@@ -543,9 +544,8 @@ pcem_SOURCES = 386.c 386_dynarec.c 386_dynarec_ops.c 808x.c \
 	$(am__append_3) $(am__append_4) $(am__append_6) \
 	$(am__append_9) $(am__append_11) $(am__append_14)
 pcem_CFLAGS = $(shell wx-config --cxxflags) $(shell sdl2-config \
-	--cflags) -Dfopen64=fopen -Dfseeko64=fseeko -Dftello64=ftello \
-	-Doff64_t=off_t $(am__append_5) $(am__append_7) \
-	$(am__append_12)
+	--cflags) $(am__append_5) $(am__append_7) $(am__append_12) \
+	$(am__append_15)
 pcem_CXXFLAGS = $(shell wx-config --cxxflags) $(shell sdl2-config \
 	--cflags) $(am__append_8) $(am__append_13)
 pcem_LDADD = @LIBS@ $(am__append_1) $(am__append_10)