diff --git a/src/core/MixHelpers.cpp b/src/core/MixHelpers.cpp
index edc2730b2a6..74101eea812 100644
--- a/src/core/MixHelpers.cpp
+++ b/src/core/MixHelpers.cpp
@@ -77,7 +77,7 @@ bool sanitize( sampleFrame * src, int frames )
 	{
 		for( int c = 0; c < 2; ++c )
 		{
-			if( isinff( src[f][c] ) || isnanf( src[f][c] ) )
+			if( unlikely( isinff( src[f][c] ) || isnanf( src[f][c] ) ) )
 			{
 				#ifdef LMMS_DEBUG
 					printf("Bad data, clearing buffer. frame: ");