diff --git a/tests/ma_duplex.c b/tests/ma_duplex.c
index c5ed9fa1..7099285d 100644
--- a/tests/ma_duplex.c
+++ b/tests/ma_duplex.c
@@ -34,7 +34,7 @@ void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uin
     MA_ASSERT(pDevice->capture.format == pDevice->playback.format);
 
     /* In this test the format and channel count are the same for both input and output which means we can just memcpy(). */
-    ma_copy_memory(pOutput, pInput, frameCount * ma_get_bytes_per_frame(pDevice->capture.format, pDevice->capture.channels));
+    MA_COPY_MEMORY(pOutput, pInput, frameCount * ma_get_bytes_per_frame(pDevice->capture.format, pDevice->capture.channels));
 
 #if defined(OUTPUT_WAV) && OUTPUT_WAV==1
     /* Also write to a wav file for debugging. */