diff --git a/src/gl/data/gl_matrix.cpp b/src/gl/data/gl_matrix.cpp
index bc0f4129f..d8017ad40 100644
--- a/src/gl/data/gl_matrix.cpp
+++ b/src/gl/data/gl_matrix.cpp
@@ -422,7 +422,7 @@ void
 VSMatrix::computeNormalMatrix(const FLOATTYPE *aMatrix) 
 {
 
-	FLOATTYPE mMat3x3[9];
+	double mMat3x3[9];
 
 	mMat3x3[0] = aMatrix[0];
 	mMat3x3[1] = aMatrix[1];
@@ -436,7 +436,7 @@ VSMatrix::computeNormalMatrix(const FLOATTYPE *aMatrix)
 	mMat3x3[7] = aMatrix[9];
 	mMat3x3[8] = aMatrix[10];
 
-	FLOATTYPE det, invDet;
+	double det, invDet;
 
 	det = mMat3x3[0] * (mMat3x3[4] * mMat3x3[8] - mMat3x3[5] * mMat3x3[7]) +
 		  mMat3x3[1] * (mMat3x3[5] * mMat3x3[6] - mMat3x3[8] * mMat3x3[3]) +
diff --git a/src/gl/scene/gl_sprite.cpp b/src/gl/scene/gl_sprite.cpp
index 7bea8d82c..4a94cdb9c 100644
--- a/src/gl/scene/gl_sprite.cpp
+++ b/src/gl/scene/gl_sprite.cpp
@@ -437,7 +437,7 @@ inline void GLSprite::PutSprite(bool translucent)
 {
 	int list;
 	// [BB] Allow models to be drawn in the GLDL_TRANSLUCENT pass.
-	if (translucent || (!modelframe && (actor->renderflags & RF_SPRITETYPEMASK) != RF_WALLSPRITE))
+	if (translucent || actor == nullptr || (!modelframe && (actor->renderflags & RF_SPRITETYPEMASK) != RF_WALLSPRITE))
 	{
 		list = GLDL_TRANSLUCENT;
 	}