diff --git a/include/sst/voicemanager/managers/polymanager.h b/include/sst/voicemanager/managers/polymanager.h
index 136f350..953accb 100644
--- a/include/sst/voicemanager/managers/polymanager.h
+++ b/include/sst/voicemanager/managers/polymanager.h
@@ -383,7 +383,7 @@ template <typename Cfg, typename VoiceResponder, typename MonoResponder> struct
     {
         for (auto &vi : voiceInfo)
         {
-            if (vi.port == port && vi.channel == channel && vi.gated)
+            if (vi.activeVoiceCookie && vi.port == port && vi.channel == channel && vi.gated)
             {
                 responder.setVoiceMIDIMPETimbre(vi.activeVoiceCookie, val);
             }
@@ -394,7 +394,7 @@ template <typename Cfg, typename VoiceResponder, typename MonoResponder> struct
     {
         for (auto &vi : voiceInfo)
         {
-            if (vi.port == port && vi.channel == channel && vi.gated)
+            if (vi.activeVoiceCookie && vi.port == port && vi.channel == channel && vi.gated)
             {
                 responder.setVoiceMIDIMPEChannelPressure(vi.activeVoiceCookie, val);
             }