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-rw-r--r--winsup/w32api/include/mmsystem.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/winsup/w32api/include/mmsystem.h b/winsup/w32api/include/mmsystem.h
index 95da48c0b..e7187fd1a 100644
--- a/winsup/w32api/include/mmsystem.h
+++ b/winsup/w32api/include/mmsystem.h
@@ -1009,7 +1009,8 @@ typedef struct pcmwaveformat_tag {
WAVEFORMAT wf;
WORD wBitsPerSample;
} PCMWAVEFORMAT, *PPCMWAVEFORMAT,*LPPCMWAVEFORMAT;
-#ifndef _WAVEFORMATEX_
+#ifndef _LPCWAVEFORMATEX_DEFINED
+#define _LPCWAVEFORMATEX_DEFINED
#define _WAVEFORMATEX_
typedef struct tWAVEFORMATEX {
WORD wFormatTag;