--- netty-tcnative-netty-tcnative-1.1.30.Fork2/src/main/native-package/m4/custom.m4
+++ netty-tcnative-netty-tcnative-1.1.30.Fork2/src/main/native-package/m4/custom.m4
@@ -47,7 +47,7 @@
   fi
 
   dnl Update the compiler/linker flags to add APR and OpenSSL to the build path.
-  CFLAGS="$CFLAGS $TCN_OPENSSL_INC $APR_INCLUDES"
+  CFLAGS="$CFLAGS $TCN_OPENSSL_INC $APR_INCLUDES -D_LARGEFILE64_SOURCE"
   CXXFLAGS="$CXXFLAGS $TCN_OPENSSL_INC $APR_INCLUDES"
   LDFLAGS="$LDFLAGS $TCN_OPENSSL_LIBS $APR_LIBS"
   AC_SUBST(CFLAGS)