diff --git a/deploy_tool/main.cpp b/deploy_tool/main.cpp
index 6965008..98c843b 100644
--- a/deploy_tool/main.cpp
+++ b/deploy_tool/main.cpp
@@ -317,7 +317,7 @@ int main(int argc, char * argv[]) {
 	out_plugins_dir = out_dir + "plugins/";
 	if (!cli.argumentValue("pqt_out_plugins").isEmpty()) {
 		out_plugins_dir = cli.argumentValue("pqt_out_plugins");
-		if (out_plugins_dir.endsWith("/"))
+		if (!out_plugins_dir.endsWith("/"))
 			out_plugins_dir.append('/');
 	}
 	int etcnt = 0;