diff --git a/reactos/dll/win32/winmm/wavemap/wavemap.rbuild b/reactos/dll/win32/winmm/wavemap/wavemap.rbuild
index 41d13cdd6e4..e9215e49589 100644
--- a/reactos/dll/win32/winmm/wavemap/wavemap.rbuild
+++ b/reactos/dll/win32/winmm/wavemap/wavemap.rbuild
@@ -1,4 +1,4 @@
-<module name="wavemap" type="win32dll" entrypoint="0" baseaddress="${BASEADDRESS_WAVEMAP}" installbase="system32" installname="wavemap.dll" allowwarnings="true">
+<module name="wavemap" type="win32dll" entrypoint="0" extension=".drv" baseaddress="${BASEADDRESS_WAVEMAP}" installbase="system32" installname="msacm32.drv" allowwarnings="true">
 	<importlibrary definition="msacm.spec.def" />
 	<include base="wavemap">.</include>
 	<include base="ReactOS">include/reactos/wine</include>
diff --git a/reactos/dll/win32/winmm/winemm.h b/reactos/dll/win32/winmm/winemm.h
index 22ff8ed1032..cd70e5d4670 100644
--- a/reactos/dll/win32/winmm/winemm.h
+++ b/reactos/dll/win32/winmm/winemm.h
@@ -30,7 +30,7 @@
 
 #define WINE_DEFAULT_WINMM_DRIVER     "oss"
 #define WINE_DEFAULT_WINMM_MAPPER     "msacm.drv"
-#define WINE_DEFAULT_WINMM_MIDI       "midimap.drv"
+#define WINE_DEFAULT_WINMM_MIDI       "midimap.dll"
 
 typedef DWORD (WINAPI *MessageProc16)(UINT16 wDevID, UINT16 wMsg, DWORD dwUser, DWORD dwParam1, DWORD dwParam2);
 typedef DWORD (WINAPI *MessageProc32)(UINT wDevID, UINT wMsg, DWORD dwUser, DWORD dwParam1, DWORD dwParam2);