diff --git a/include/asm_ia32.h b/include/asm_ia32.h
index 035ea4d..7e51577 100644
--- a/include/asm_ia32.h
+++ b/include/asm_ia32.h
@@ -94,7 +94,7 @@
 #define ch_dist_mult	44
 #define ch_master_vol	48
 #define ch_phase		52
-#define ch_phase		56
+#define ch_oldphase		56
 #define ch_size			60
 
 // portable_samplepair_t structure