diff --git a/Makefile b/Makefile
index 4af714e58..104cdaee8 100644
--- a/Makefile
+++ b/Makefile
@@ -836,7 +836,7 @@ install-shared: install-headers $(SHARED4)
 
 # install static by default + install shared if it exists
 install: install-static
-	[ -e $(SHARED4) ] && $(MAKE) install-shared
+	[ ! -e $(SHARED4) ] || $(MAKE) install-shared
 
 #-------------------------------------------------