diff --git a/Makefile-libostree.am b/Makefile-libostree.am
index 15711dc9..192db36e 100644
--- a/Makefile-libostree.am
+++ b/Makefile-libostree.am
@@ -24,9 +24,9 @@ noinst_LTLIBRARIES += libostree-kernel-args.la
 
 if ENABLE_RUST
 bupsplitpath = @abs_top_builddir@/target/@RUST_TARGET_SUBDIR@/libbupsplit_rs.a
-BUPSPLIT_RUST_SOURCES = rust/src/bupsplit.rs
-EXTRA_DIST += $(BUPSPLIT_RUST_SOURCES)
-$(bupsplitpath): Makefile $(BUPSPLIT_RUST_SOURCES)
+BUPSPLIT_RUST_SRCS = rust/src/bupsplit.rs
+EXTRA_DIST += $(BUPSPLIT_RUST_SRCS)
+$(bupsplitpath): Makefile $(BUPSPLIT_RUST_SRCS)
 	cd $(top_srcdir)/rust && CARGO_TARGET_DIR=@abs_top_builddir@/target cargo build --verbose $(CARGO_RELEASE_ARGS)
 else
 bupsplitpath = libbupsplit.la