diff --git a/make/rules.mk b/make/rules.mk
index 9dbd04d5..c97c03b7 100644
--- a/make/rules.mk
+++ b/make/rules.mk
@@ -41,7 +41,8 @@ endif
 	$(CC) $< $(LDFLAGS) -o $@
 
 $(LIB_SO): $(LIB_A)
-	$(CC) -shared -Wl,--whole-archive,-soname=$(notdir $@) $< -Wl,--no-whole-archive $(filter-out -l$(LIBNAME),$(LDFLAGS)) -o $@
+	$(CC) -shared -Wl,--whole-archive,-soname=$(notdir $@) $< -Wl,--no-whole-archive \
+		$(filter-out -l$(LIBNAME),$(LDFLAGS)) -o $@
 
 $(TOPDIR)/include:
 	mkdir -p $@