diff --git a/packages/x11/lib/libpciaccess/build b/packages/x11/lib/libpciaccess/build
index eb36abffa0..5a1385fe68 100755
--- a/packages/x11/lib/libpciaccess/build
+++ b/packages/x11/lib/libpciaccess/build
@@ -22,6 +22,8 @@
 
 . config/options $1
 
+CFLAGS="$CFLAGS -D_LARGEFILE64_SOURCE"
+
 export ac_cv_header_asm_mtrr_h=set
 
 cd $PKG_BUILD