diff --git a/rust-fb_procfs.spec b/rust-fb_procfs.spec
index 68dc192..e61bdc6 100644
--- a/rust-fb_procfs.spec
+++ b/rust-fb_procfs.spec
@@ -13,6 +13,8 @@ Summary:        Crate for reading procfs
 License:        ASL 2.0
 URL:            https://crates.io/crates/fb_procfs
 Source:         %{crates_source}
+# explicit cast for statvfs blocks(), needed on non-64bit arches
+Patch:          %{crate}-fix-32bit.patch
 
 ExclusiveArch:  %{rust_arches}