diff --git a/src/c/Makefile.in b/src/c/Makefile.in
index 1bb386312..a9967f13e 100644
--- a/src/c/Makefile.in
+++ b/src/c/Makefile.in
@@ -122,7 +122,7 @@ $(HDIR)/%.h: $(top_srcdir)/h/%.h
 nucl: $(NUCL_SRCS) nucl.c
 	$(CC) $(NUCL_CFLG) -o $@ $^
 
-r2rs: $(NUCL_SRCS) r2rs.c
+r2rs: $(NUCL_SRCS) character.c reader.c reader/parse_fixnum.c r2rs.c
 	$(CC) $(NUCL_CFLG) -o $@ $^
 
 ../libeclmin.a: $(OBJS) all_symbols.o all_symbols2.o