diff --git a/src/libFLAC++/file_decoder.cpp b/src/libFLAC++/file_decoder.cpp
index 494109da..b991f5a1 100644
--- a/src/libFLAC++/file_decoder.cpp
+++ b/src/libFLAC++/file_decoder.cpp
@@ -32,6 +32,11 @@
 #include "FLAC++/decoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace FLAC {
 	namespace Decoder {
 
diff --git a/src/libFLAC++/file_encoder.cpp b/src/libFLAC++/file_encoder.cpp
index ec93a61f..7aaccd11 100644
--- a/src/libFLAC++/file_encoder.cpp
+++ b/src/libFLAC++/file_encoder.cpp
@@ -32,6 +32,11 @@
 #include "FLAC++/encoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace FLAC {
 	namespace Encoder {
 
diff --git a/src/libFLAC++/seekable_stream_decoder.cpp b/src/libFLAC++/seekable_stream_decoder.cpp
index d3b0b437..af73c3f8 100644
--- a/src/libFLAC++/seekable_stream_decoder.cpp
+++ b/src/libFLAC++/seekable_stream_decoder.cpp
@@ -32,6 +32,11 @@
 #include "FLAC++/decoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace FLAC {
 	namespace Decoder {
 
diff --git a/src/libFLAC++/seekable_stream_encoder.cpp b/src/libFLAC++/seekable_stream_encoder.cpp
index 926e4c9d..d2a090ee 100644
--- a/src/libFLAC++/seekable_stream_encoder.cpp
+++ b/src/libFLAC++/seekable_stream_encoder.cpp
@@ -32,6 +32,11 @@
 #include "FLAC++/encoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace FLAC {
 	namespace Encoder {
 
diff --git a/src/libFLAC++/stream_decoder.cpp b/src/libFLAC++/stream_decoder.cpp
index 30a5d400..0f14514a 100644
--- a/src/libFLAC++/stream_decoder.cpp
+++ b/src/libFLAC++/stream_decoder.cpp
@@ -32,6 +32,11 @@
 #include "FLAC++/decoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace FLAC {
 	namespace Decoder {
 
diff --git a/src/libFLAC++/stream_encoder.cpp b/src/libFLAC++/stream_encoder.cpp
index ff9cf30c..7d12c9c0 100644
--- a/src/libFLAC++/stream_encoder.cpp
+++ b/src/libFLAC++/stream_encoder.cpp
@@ -32,6 +32,11 @@
 #include "FLAC++/encoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace FLAC {
 	namespace Encoder {
 
diff --git a/src/libOggFLAC++/file_decoder.cpp b/src/libOggFLAC++/file_decoder.cpp
index 678908e7..19e1b5f4 100644
--- a/src/libOggFLAC++/file_decoder.cpp
+++ b/src/libOggFLAC++/file_decoder.cpp
@@ -32,6 +32,11 @@
 #include "OggFLAC++/decoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace OggFLAC {
 	namespace Decoder {
 
diff --git a/src/libOggFLAC++/file_encoder.cpp b/src/libOggFLAC++/file_encoder.cpp
index 74fe683a..cd575b71 100644
--- a/src/libOggFLAC++/file_encoder.cpp
+++ b/src/libOggFLAC++/file_encoder.cpp
@@ -32,6 +32,11 @@
 #include "OggFLAC++/encoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace OggFLAC {
 	namespace Encoder {
 
diff --git a/src/libOggFLAC++/seekable_stream_decoder.cpp b/src/libOggFLAC++/seekable_stream_decoder.cpp
index 5d952aa8..e27d8955 100644
--- a/src/libOggFLAC++/seekable_stream_decoder.cpp
+++ b/src/libOggFLAC++/seekable_stream_decoder.cpp
@@ -32,6 +32,11 @@
 #include "OggFLAC++/decoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace OggFLAC {
 	namespace Decoder {
 
diff --git a/src/libOggFLAC++/seekable_stream_encoder.cpp b/src/libOggFLAC++/seekable_stream_encoder.cpp
index 2b6b8b09..39304885 100644
--- a/src/libOggFLAC++/seekable_stream_encoder.cpp
+++ b/src/libOggFLAC++/seekable_stream_encoder.cpp
@@ -32,6 +32,11 @@
 #include "OggFLAC++/encoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace OggFLAC {
 	namespace Encoder {
 
diff --git a/src/libOggFLAC++/stream_decoder.cpp b/src/libOggFLAC++/stream_decoder.cpp
index 2f3adb6c..ab88da7e 100644
--- a/src/libOggFLAC++/stream_decoder.cpp
+++ b/src/libOggFLAC++/stream_decoder.cpp
@@ -32,6 +32,11 @@
 #include "OggFLAC++/decoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace OggFLAC {
 	namespace Decoder {
 
diff --git a/src/libOggFLAC++/stream_encoder.cpp b/src/libOggFLAC++/stream_encoder.cpp
index 6c8a9e05..4766343e 100644
--- a/src/libOggFLAC++/stream_encoder.cpp
+++ b/src/libOggFLAC++/stream_encoder.cpp
@@ -32,6 +32,11 @@
 #include "OggFLAC++/encoder.h"
 #include "FLAC/assert.h"
 
+#ifdef _MSC_VER
+// warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
+#pragma warning ( disable : 4800 )
+#endif
+
 namespace OggFLAC {
 	namespace Encoder {