diff --git a/sys/dev/sound/pci/via82c686.c b/sys/dev/sound/pci/via82c686.c
index 0fcea6027f15..5f5a2b1652c0 100644
--- a/sys/dev/sound/pci/via82c686.c
+++ b/sys/dev/sound/pci/via82c686.c
@@ -40,9 +40,22 @@
 
 #define SEGS_PER_CHAN	(NSEGS/2)
 
+#define TIMEOUT	50
+#define	VIA_BUFFSIZE	0x4000
+
 #undef DEB
 #define DEB(x)
 
+/* we rely on this struct being packed to 64 bits */
+struct via_dma_op {
+        u_int32_t ptr;
+        u_int32_t flags;
+#define VIA_DMAOP_EOL         0x80000000
+#define VIA_DMAOP_FLAG        0x40000000
+#define VIA_DMAOP_STOP        0x20000000
+#define VIA_DMAOP_COUNT(x)    ((x)&0x00FFFFFF)
+};
+
 struct via_info;
 
 struct via_chinfo {
diff --git a/sys/dev/sound/pci/via82c686.h b/sys/dev/sound/pci/via82c686.h
index 1d85c9b14898..a1fcf4b3837d 100644
--- a/sys/dev/sound/pci/via82c686.h
+++ b/sys/dev/sound/pci/via82c686.h
@@ -49,15 +49,6 @@
  * ftp://ftp.alsa-project.org/pub/manuals/ad/AD1881_0.pdf (example AC'97 codec)
  */
 
-struct via_dma_op {
-        u_int32_t ptr;
-        u_int32_t flags;
-#define VIA_DMAOP_EOL         0x80000000
-#define VIA_DMAOP_FLAG        0x40000000
-#define VIA_DMAOP_STOP        0x20000000
-#define VIA_DMAOP_COUNT(x)    ((x)&0x00FFFFFF)
-};
-
 #define VIA_PCICONF_MISC      0x41
 #define         VIA_PCICONF_ACLINKENAB 0x80     /* ac link enab */
 #define         VIA_PCICONF_ACNOTRST   0x40     /* ~(ac reset) */
@@ -102,7 +93,4 @@ struct via_dma_op {
 #define AC97_REG_EXT_DAC_RATE           0x2C
 #define AC97_REG_EXT_ADC_RATE           0x32
 
-#define TIMEOUT	50
-#define	VIA_BUFFSIZE	0x4000
-
 #endif /* _VIA_H */