Index: /trunk/Include/api_mmsys.sbp
===================================================================
--- /trunk/Include/api_mmsys.sbp	(revision 340)
+++ /trunk/Include/api_mmsys.sbp	(revision 341)
@@ -457,5 +457,5 @@
 
 ' OLD general waveform format structure (information common to all formats)
-Type WAVEFORMAT
+Type Align(1) WAVEFORMAT
 	wFormatTag As Word
 	nChannels As Word
@@ -471,5 +471,5 @@
 
 ' specific waveform format structure for PCM data
-Type PCMWAVEFORMAT
+Type Align(1) PCMWAVEFORMAT
 	wf As WAVEFORMAT
 	wBitsPerSample As Word
@@ -478,5 +478,5 @@
 TypeDef LPPCMWAVEFORMAT = *PCMWAVEFORMAT
 
-Type WAVEFORMATEX
+Type Align(1) WAVEFORMATEX
 	wFormatTag As Word
 	nChannels As Word