diff --git a/audio/drivers/coreaudio3.m b/audio/drivers/coreaudio3.m
index 408d080385..176024411b 100644
--- a/audio/drivers/coreaudio3.m
+++ b/audio/drivers/coreaudio3.m
@@ -89,7 +89,7 @@ static void rb_init(ringbuffer_h r, size_t cap)
 static void rb_free(ringbuffer_h r)
 {
    free(r->buffer);
-   bzero(r, sizeof(*r));
+   memset(r, 0, sizeof(*r));
 }
 
 #define UNLIKELY(x) __builtin_expect((x), 0)
diff --git a/gfx/common/metal/Context.m b/gfx/common/metal/Context.m
index a16d486860..1cef6ec0a7 100644
--- a/gfx/common/metal/Context.m
+++ b/gfx/common/metal/Context.m
@@ -744,12 +744,14 @@ static const NSUInteger kConstantAlignment = 4;
 
 - (bool)allocRange:(BufferRange *)range length:(NSUInteger)length
 {
-   bzero(range, sizeof(*range));
+   MTLResourceOptions opts;
+
+   memset(range, 0, sizeof(*range));
 
 #if TARGET_OS_OSX
-   MTLResourceOptions opts = MTLResourceStorageModeManaged;
+   opts = MTLResourceStorageModeManaged;
 #else
-   MTLResourceOptions opts = MTLResourceStorageModeShared;
+   opts = MTLResourceStorageModeShared;
 #endif
 
    if (!_head)