diff --git a/Makefile b/Makefile
index de49301..10528f8 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ INSTALL_PREFIX = dist
 RUNTIME_ASSERT = true
 
 # Internal variables
-override CFLAGS              = -Wall -Wextra -Werror -pedantic -Isrc -D_LARGEFILE64_SOURCE
+override CFLAGS              = -Wall -Wextra -Werror -pedantic -Isrc
 override LIBFLAGS            = -fPIC
 override CSTD               := -std=gnu11
 override CXXSTD             := -std=gnu++11
diff --git a/src/os/file/posix/file_posix.c b/src/os/file/posix/file_posix.c
index 999cc25..ee6db15 100644
--- a/src/os/file/posix/file_posix.c
+++ b/src/os/file/posix/file_posix.c
@@ -16,6 +16,7 @@
 #define lseek64 lseek
 #endif // !WAPP_PLATFORM_APPLE
 
+#define __USE_LARGEFILE64
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/types.h>