diff --git a/include/os.h b/include/os.h
index d168d352e..82e1ac013 100644
--- a/include/os.h
+++ b/include/os.h
@@ -133,15 +133,6 @@ typedef struct {
 #define VOICE_WARN_NOT_FIT 0x4000 /* No words match recognition word (No. 1 Candidate Distance Value > 1600) */
 #define VOICE_WARN_TOO_NOISY 0x8000 /* Too much ambient noise (Relative Voice Level =< 400) */
 
-// #define CONT_ERR_NO_CONTROLLER
-// #define CONT_ERR_DEVICE
-// #define CONT_ERR_NOT_READY
-// #define CONT_ERR_CONTRFAIL
-// #define CONT_ERR_VOICE_NO_RESPONSE
-// #define CONT_ERR_INVALID
-// #define CONT_ERR_VOICE_WORD
-// #define CONT_ERR_VOICE_MEMORY
-
 typedef struct {
     /* 0x0 */ OSMesgQueue* mq;
     /* 0x4 */ s32 port; /* Controller port */
diff --git a/src/libultra/voice/voiceinit.c b/src/libultra/voice/voiceinit.c
index 50dab4fdc..54e13fa4c 100644
--- a/src/libultra/voice/voiceinit.c
+++ b/src/libultra/voice/voiceinit.c
@@ -37,7 +37,7 @@ s32 osVoiceInit(OSMesgQueue* siMessageQ, OSVoiceHandle* hd, s32 channel) {
             if (errorCode != 0) {
                 return errorCode;
             }
-            if ((sp37 & 2) != 0) {
+            if (sp37 & 2) {
                 return 0xF;
             }