3 files changed, 6 insertions, 0 deletions
diff --git a/Alc/mixer/mixer_c.c b/Alc/mixer/mixer_c.c
index 05b7932d..84485206 100644
--- a/Alc/mixer/mixer_c.c
+++ b/Alc/mixer/mixer_c.c
@@ -122,6 +122,7 @@ void Mix_C(const ALfloat *data, ALsizei OutChans, ALfloat (*restrict OutBuffer)[
     ALfloat gain, delta, step;
     ALsizei c;
 
+    ASSUME(OutChans > 0);
     ASSUME(BufferSize > 0);
     delta = (Counter > 0) ? 1.0f/(ALfloat)Counter : 0.0f;
 
@@ -160,6 +161,7 @@ void MixRow_C(ALfloat *OutBuffer, const ALfloat *Gains, const ALfloat (*restrict
 {
     ALsizei c, i;
 
+    ASSUME(InChans > 0);
     ASSUME(BufferSize > 0);
 
     for(c = 0;c < InChans;c++)
diff --git a/Alc/mixer/mixer_neon.c b/Alc/mixer/mixer_neon.c
index 1413d1c1..1a5e8ee7 100644
--- a/Alc/mixer/mixer_neon.c
+++ b/Alc/mixer/mixer_neon.c
@@ -169,6 +169,7 @@ void Mix_Neon(const ALfloat *data, ALsizei OutChans, ALfloat (*restrict OutBuffe
     float32x4_t gain4;
     ALsizei c;
 
+    ASSUME(OutChans > 0);
     ASSUME(BufferSize > 0);
     data = ASSUME_ALIGNED(data, 16);
     OutBuffer = ASSUME_ALIGNED(OutBuffer, 16);
@@ -242,6 +243,7 @@ void MixRow_Neon(ALfloat *OutBuffer, const ALfloat *Gains, const ALfloat (*restr
     float32x4_t gain4;
     ALsizei c;
 
+    ASSUME(InChans > 0);
     ASSUME(BufferSize > 0);
     data = ASSUME_ALIGNED(data, 16);
     OutBuffer = ASSUME_ALIGNED(OutBuffer, 16);
diff --git a/Alc/mixer/mixer_sse.c b/Alc/mixer/mixer_sse.c
index 81dc0a34..a178477f 100644
--- a/Alc/mixer/mixer_sse.c
+++ b/Alc/mixer/mixer_sse.c
@@ -139,6 +139,7 @@ void Mix_SSE(const ALfloat *data, ALsizei OutChans, ALfloat (*restrict OutBuffer
     __m128 gain4;
     ALsizei c;
 
+    ASSUME(OutChans > 0);
     ASSUME(BufferSize > 0);
     delta = (Counter > 0) ? 1.0f/(ALfloat)Counter : 0.0f;
 
@@ -211,6 +212,7 @@ void MixRow_SSE(ALfloat *OutBuffer, const ALfloat *Gains, const ALfloat (*restri
     __m128 gain4;
     ALsizei c;
 
+    ASSUME(InChans > 0);
     ASSUME(BufferSize > 0);
 
     for(c = 0;c < InChans;c++)