Index: src/sound/LADSPAPluginFactory.cpp
===================================================================
--- src/sound/LADSPAPluginFactory.cpp.orig
+++ src/sound/LADSPAPluginFactory.cpp
@@ -565,7 +565,7 @@ LADSPAPluginFactory::getPluginPath()
         path = cpath;
 
     if (path == "") {
-        path = "/usr/local/lib/ladspa:/usr/lib/ladspa";
+        path = "/usr/local/lib/ladspa:/usr/lib/ladspa:/usr/local/lib64/ladspa:/usr/lib64/ladspa";
         char *home = getenv("HOME");
         if (home)
             path = std::string(home) + "/.ladspa:" + path;
Index: src/sound/DSSIPluginFactory.cpp
===================================================================
--- src/sound/DSSIPluginFactory.cpp.orig
+++ src/sound/DSSIPluginFactory.cpp
@@ -234,7 +234,7 @@ DSSIPluginFactory::getPluginPath()
         path = cpath;
 
     if (path == "") {
-        path = "/usr/local/lib/dssi:/usr/lib/dssi";
+        path = "/usr/local/lib/dssi:/usr/lib/dssi:/usr/local/lib64/dssi:/usr/lib64/dssi";
         char *home = getenv("HOME");
         if (home)
             path = std::string(home) + "/.dssi:" + path;