diff --git a/srcpkgs/geomyidae/template b/srcpkgs/geomyidae/template
index 1a00b20fa30..17be4a77fe5 100644
--- a/srcpkgs/geomyidae/template
+++ b/srcpkgs/geomyidae/template
@@ -11,6 +11,7 @@ homepage="gopher://bitreich.org/1/scm/geomyidae/"
 distfiles="ftp://bitreich.org/releases/${pkgname}/${pkgname}-v${version}.tar.gz"
 checksum=3bacdc72bcf9aabb6f69f350bcce7453625f1b8d8b016249fc35df8832a1e1d7
 system_accounts="_geomyidae"
+CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 
 pre_build() {
 	sed -i 's| -O0||g' Makefile