diff --git a/test/Makefile b/test/Makefile
index 399d7168ff..80ab108a96 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -76,7 +76,7 @@ uninstall:
 unit unit-tests: bins
 	PATH="$(BINDIR):$(PATH)" $(MAKE) rc
 	PKG_CONFIG_PATH=$(PREFIX)/lib/pkgconfig \
-	LD_LIBRARY_PATH=$(PREFIX)/lib \
+	LD_LIBRARY_PATH=$(LD_LIBRARY_PATH):$(PREFIX)/lib \
 	PATH="$(BINDIR):$(PATH)" \
 		$(MAKE) -C unit run