diff --git a/Makefile b/Makefile
index 10528f8..de49301 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ INSTALL_PREFIX = dist
 RUNTIME_ASSERT = true
 
 # Internal variables
-override CFLAGS              = -Wall -Wextra -Werror -pedantic -Isrc
+override CFLAGS              = -Wall -Wextra -Werror -pedantic -Isrc -D_LARGEFILE64_SOURCE
 override LIBFLAGS            = -fPIC
 override CSTD               := -std=gnu11
 override CXXSTD             := -std=gnu++11