diff --git a/libretroshare/src/plugins/pluginmanager.h b/libretroshare/src/plugins/pluginmanager.h
index c8a7d3290..09f05563b 100644
--- a/libretroshare/src/plugins/pluginmanager.h
+++ b/libretroshare/src/plugins/pluginmanager.h
@@ -45,7 +45,7 @@ public:
 class RsPluginManager: public RsPluginHandler, public p3Config
 {
 	public:
-        RsPluginManager(const RsFileHash& current_executable_sha1_hash) ;
+		explicit RsPluginManager(const RsFileHash& current_executable_sha1_hash) ;
 		virtual ~RsPluginManager() {}
 		
 		// ------------ Derived from RsPluginHandler ----------------//