diff --git a/src/common.c b/src/common.c
index 80fa26e..a3b8210 100644
--- a/src/common.c
+++ b/src/common.c
@@ -258,10 +258,12 @@ static char const * _common_size(off_t size)
 		unit = N_("MB");
 	else if((sz /= 1024) < 1024)
 		unit = N_("GB");
+	else if((sz /= 1024) < 1024)
+		unit = N_("TB");
 	else
 	{
 		sz /= 1024;
-		unit = N_("TB");
+		unit = N_("PB");
 	}
 	snprintf(buf, sizeof(buf), "%.1f %s", sz, _(unit));
 	return buf;
diff --git a/src/plugins/properties.c b/src/plugins/properties.c
index 8d529ae..8c9f1f0 100644
--- a/src/plugins/properties.c
+++ b/src/plugins/properties.c
@@ -553,10 +553,12 @@ static void _refresh_size(Properties * properties, size_t size)
 		unit = _("MB");
 	else if((sz /= 1024) < 1024)
 		unit = _("GB");
+	else if((sz /= 1024) < 1024)
+		unit = _("TB");
 	else
 	{
 		sz /= 1024;
-		unit = _("TB");
+		unit = _("PB");
 	}
 	snprintf(buf, sizeof(buf), format, sz, unit);
 	gtk_label_set_text(GTK_LABEL(properties->size), buf);
diff --git a/src/plugins/volumes.c b/src/plugins/volumes.c
index 740e9d4..ac010e3 100644
--- a/src/plugins/volumes.c
+++ b/src/plugins/volumes.c
@@ -545,10 +545,12 @@ static void _list_add_size(char * buf, size_t len, unsigned long bsize,
 		unit = _("MB");
 	else if((sz /= 1024) < 1024)
 		unit = _("GB");
+	else if((sz /= 1024) < 1024)
+		unit = _("TB");
 	else
 	{
 		sz /= 1024;
-		unit = _("TB");
+		unit = _("PB");
 	}
 	snprintf(buf, len, format, sz, unit);
 }