diff --git a/src/AudioBackend.c b/src/AudioBackend.c
index 83bcd5c6e..1769b20af 100644
--- a/src/AudioBackend.c
+++ b/src/AudioBackend.c
@@ -1383,6 +1383,8 @@ cc_bool Audio_FastPlay(struct AudioContext* ctx, struct AudioData* data) { retur
 cc_result Audio_PlayData(struct AudioContext* ctx, struct AudioData* data) {
 	return ERR_NOT_SUPPORTED;
 }
+
+cc_bool Audio_DescribeError(cc_result res, cc_string* dst) { return false; }
 #endif
 
 
diff --git a/src/ClassiCube.vcxproj b/src/ClassiCube.vcxproj
index 39539976a..51fcf338e 100644
--- a/src/ClassiCube.vcxproj
+++ b/src/ClassiCube.vcxproj
@@ -458,6 +458,7 @@
     <ClCompile Include="Graphics_GCWii.c" />
     <ClCompile Include="Graphics_GL1.c" />
     <ClCompile Include="Audio.c" />
+    <ClCompile Include="AudioBackend.c" />
     <ClCompile Include="Camera.c" />
     <ClCompile Include="AxisLinesRenderer.c" />
     <ClCompile Include="Block.c" />