diff --git a/engine/platform/linux/s_alsa.c b/engine/platform/linux/s_alsa.c
index 54d17774..2c6524ef 100644
--- a/engine/platform/linux/s_alsa.c
+++ b/engine/platform/linux/s_alsa.c
@@ -184,7 +184,7 @@ qboolean SNDDMA_Init( void )
 		return false;
 	}
 
-	dma.buffer = Mem_Malloc( sndpool, samples * 2 );  //allocate pcm frame buffer
+	dma.buffer = Mem_Calloc( sndpool, samples * 2 );  //allocate pcm frame buffer
 	dma.samplepos = 0;
 	dma.samples = samples;
 	dma.format.width = 2;
diff --git a/engine/platform/sdl/s_sdl.c b/engine/platform/sdl/s_sdl.c
index 759cf193..e763863b 100644
--- a/engine/platform/sdl/s_sdl.c
+++ b/engine/platform/sdl/s_sdl.c
@@ -175,7 +175,7 @@ qboolean SNDDMA_Init( void )
 	if( !samplecount )
 		samplecount = 0x8000;
 	dma.samples         = samplecount * obtained.channels;
-	dma.buffer          = Mem_Malloc( sndpool, dma.samples * 2 );
+	dma.buffer          = Mem_Calloc( sndpool, dma.samples * 2 );
 	dma.samplepos       = 0;
 
 	sdl_format = obtained.format;