diff --git a/stepmania/src/RageModelGeometry.cpp b/stepmania/src/RageModelGeometry.cpp
index 5f147954d6..d6848f22fe 100644
--- a/stepmania/src/RageModelGeometry.cpp
+++ b/stepmania/src/RageModelGeometry.cpp
@@ -248,9 +248,9 @@ void RageModelGeometry::LoadMilkshapeAscii( const RString& _sPath, bool bNeedsNo
 					for( int k=0; k<3; k++ )
 					{
 						ASSERT_M( nIndices[k] < Vertices.size(), ssprintf("mesh \"%s\" tri #%i accesses vertex %i, but we only have %i",
-							szName, j, nIndices[k], Vertices.size()) );
+							szName, j, nIndices[k], int(Vertices.size())) );
 						ASSERT_M( nNormalIndices[k] < Normals.size(), ssprintf("mesh \"%s\" tri #%i accesses normal %i, but we only have %i",
-							szName, j, nNormalIndices[k], Normals.size()) );
+							szName, j, nNormalIndices[k], int(Normals.size())) );
 						RageModelVertex& vertex = Vertices[ nIndices[k] ];
 						RageVector3& normal = Normals[ nNormalIndices[k] ];
 						vertex.n = normal;