diff --git a/src/Dexed.ttl b/src/Dexed.ttl
index 5c8ae10..b274235 100644
--- a/src/Dexed.ttl
+++ b/src/Dexed.ttl
@@ -2432,7 +2432,7 @@ The original engine comes from MSFA (music synthesizer for android) which is bas
         lv2:name "Portamento Time" ;
         lv2:default 0 ;
         lv2:minimum 0 ;
-        lv2:maximum 1 ;
+        lv2:maximum 99 ;
         lv2:portProperty lv2:integer ;
         pg:group dexed_lv2:CONTROL ;
     ] ;
diff --git a/src/dexed_ttl.h b/src/dexed_ttl.h
index e70c072..edacb0d 100644
--- a/src/dexed_ttl.h
+++ b/src/dexed_ttl.h
@@ -368,7 +368,7 @@ static const peg_data_t p_ports[] = {
   { 0, 1, 1, 0, 1, 0 }, 
   { 0, 1, 0, 0, 1, 0 }, 
   { 0, 1, 0, 0, 1, 0 }, 
-  { 0, 1, 0, 0, 1, 0 }, 
+  { 0, 99, 0, 0, 1, 0 }, 
 };