diff --git a/src/matrix-math.c b/src/matrix-math.c
index 03895b5..64dd14a 100644
--- a/src/matrix-math.c
+++ b/src/matrix-math.c
@@ -196,6 +196,7 @@ void mat4BuildProjection(mat4 out, GLfloat r, GLfloat l, GLfloat t, GLfloat b, G
 	out[11] = -1.0f / n;
 
 	out[14] = - 2.0f * f / (f - n);
+	out[15] = 0.0f;
 }
 
 /**
@@ -458,7 +459,6 @@ void mat3Minor(mat3 out, mat3 in) {
 	result[4] = in[0] * in[8] - in[2] * in[6];
 	result[5] = in[0] * in[7] - in[1] * in[6];
 
-
 	result[6] = in[1] * in[5] - in[2] * in[4];
 	result[7] = in[0] * in[5] - in[2] * in[3];
 	result[8] = in[0] * in[4] - in[1] * in[3];