diff --git a/libs/ardour/ladspa_plugin.cc b/libs/ardour/ladspa_plugin.cc
index be3fefdaac..cebff59771 100644
--- a/libs/ardour/ladspa_plugin.cc
+++ b/libs/ardour/ladspa_plugin.cc
@@ -293,8 +293,8 @@ LadspaPlugin::set_parameter (uint32_t which, float val)
 #endif
 
 	} else {
-		warning << string_compose (_("illegal parameter number used with plugin \"%1\". This may"
-					     "indicate a change in the plugin design, and presets may be"
+		warning << string_compose (_("illegal parameter number used with plugin \"%1\". This may "
+					     "indicate a change in the plugin design, and presets may be "
 					     "invalid"), name())
 			<< endmsg;
 	}
diff --git a/libs/ardour/midi_diskstream.cc b/libs/ardour/midi_diskstream.cc
index c151b776c2..eb4aed91c6 100644
--- a/libs/ardour/midi_diskstream.cc
+++ b/libs/ardour/midi_diskstream.cc
@@ -212,7 +212,7 @@ MidiDiskstream::find_and_use_playlist (const string& name)
 	}
 
 	if (!playlist) {
-		error << string_compose(_("MidiDiskstream: Playlist \"%1\" isn't an midi playlist"), name) << endmsg;
+		error << string_compose(_("MidiDiskstream: Playlist \"%1\" isn't a midi playlist"), name) << endmsg;
 		return -1;
 	}
 
diff --git a/libs/ardour/rc_configuration.cc b/libs/ardour/rc_configuration.cc
index 972f1f2fcb..8127267975 100644
--- a/libs/ardour/rc_configuration.cc
+++ b/libs/ardour/rc_configuration.cc
@@ -103,7 +103,7 @@ RCConfiguration::load_state ()
 				return -1;
 			}
 		} else {
-			error << string_compose (_("your system %1 configuration file is empty. This probably means that there as an error installing %1"), PROGRAM_NAME) << endmsg;
+			error << string_compose (_("Your system %1 configuration file is empty. This probably means that there was an error installing %1"), PROGRAM_NAME) << endmsg;
 		}
 	}
 
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 78caf7abc4..a837a40e9c 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -1694,7 +1694,7 @@ Session::new_midi_track (const ChanCount& input, const ChanCount& output, boost:
 
 		catch (AudioEngine::PortRegistrationFailure& pfe) {
 
-			error << string_compose (_("No more JACK ports are available. You will need to stop %1 and restart JACK with ports if you need this many tracks."), PROGRAM_NAME) << endmsg;
+			error << string_compose (_("No more JACK ports are available. You will need to stop %1 and restart JACK with more ports if you need this many tracks."), PROGRAM_NAME) << endmsg;
 			goto failed;
 		}