diff --git a/src/modules/graphics/opengl/Graphics.cpp b/src/modules/graphics/opengl/Graphics.cpp
index fcc5f1694..ad08ebe04 100644
--- a/src/modules/graphics/opengl/Graphics.cpp
+++ b/src/modules/graphics/opengl/Graphics.cpp
@@ -217,7 +217,7 @@ void Graphics::setViewportSize(int width, int height)
 		gl.setViewport({0, 0, width, height}, false);
 
 		// Set up the projection matrix
-		gl.matrices.projection.back() = Matrix4::ortho(0.0, (float) width, (float) height, 0.0);
+		gl.matrices.projection = Matrix4::ortho(0.0, (float) width, (float) height, 0.0);
 	}
 }
 
@@ -442,7 +442,7 @@ void Graphics::beginPass(PassInfo::BeginAction beginAction, Colorf clearColor)
 
 	// The projection matrix is flipped compared to rendering to a canvas, due
 	// to OpenGL considering (0,0) bottom-left instead of top-left.
-	gl.matrices.projection.back() = Matrix4::ortho(0.0, (float) width, (float) height, 0.0);
+	gl.matrices.projection = Matrix4::ortho(0.0, (float) width, (float) height, 0.0);
 
 	if (GLAD_VERSION_1_0 || GLAD_EXT_sRGB_write_control)
 	{
@@ -523,7 +523,7 @@ void Graphics::beginPass(const PassInfo &info)
 	int h = firstcanvas->getHeight();
 
 	gl.setViewport({0, 0, w, h}, true);
-	gl.matrices.projection.back() = Matrix4::ortho(0.0, (float) w, 0.0, (float) h);
+	gl.matrices.projection = Matrix4::ortho(0.0, (float) w, 0.0, (float) h);
 
 	// Make sure the correct sRGB setting is used when drawing to the canvases.
 	if (GLAD_VERSION_1_0 || GLAD_EXT_sRGB_write_control)
diff --git a/src/modules/graphics/opengl/OpenGL.cpp b/src/modules/graphics/opengl/OpenGL.cpp
index 37615272d..3749829af 100644
--- a/src/modules/graphics/opengl/OpenGL.cpp
+++ b/src/modules/graphics/opengl/OpenGL.cpp
@@ -74,7 +74,6 @@ OpenGL::OpenGL()
 	, state()
 {
 	matrices.transform.reserve(10);
-	matrices.projection.reserve(2);
 }
 
 bool OpenGL::initContext()
@@ -307,10 +306,9 @@ void OpenGL::initMaxValues()
 void OpenGL::initMatrices()
 {
 	matrices.transform.clear();
-	matrices.projection.clear();
 
 	matrices.transform.push_back(Matrix4());
-	matrices.projection.push_back(Matrix4());
+	matrices.projection = Matrix4();
 }
 
 void OpenGL::createDefaultTexture()
@@ -364,7 +362,7 @@ void OpenGL::prepareDraw()
 	// because uniform uploads can be significantly slower than glLoadMatrix.
 	if (GLAD_VERSION_1_0)
 	{
-		const Matrix4 &curproj = matrices.projection.back();
+		const Matrix4 &curproj = matrices.projection;
 		const Matrix4 &curxform = matrices.transform.back();
 
 		const Matrix4 &lastproj = state.lastProjectionMatrix;
@@ -377,7 +375,7 @@ void OpenGL::prepareDraw()
 			glLoadMatrixf(curproj.getElements());
 			glMatrixMode(GL_MODELVIEW);
 
-			state.lastProjectionMatrix = matrices.projection.back();
+			state.lastProjectionMatrix = matrices.projection;
 		}
 
 		// Same with the transform matrix.
diff --git a/src/modules/graphics/opengl/OpenGL.h b/src/modules/graphics/opengl/OpenGL.h
index ce186e607..c740c35e6 100644
--- a/src/modules/graphics/opengl/OpenGL.h
+++ b/src/modules/graphics/opengl/OpenGL.h
@@ -126,7 +126,7 @@ public:
 	struct
 	{
 		std::vector<Matrix4> transform;
-		std::vector<Matrix4> projection;
+		Matrix4 projection;
 	} matrices;
 
 	class TempTransform
diff --git a/src/modules/graphics/opengl/Shader.cpp b/src/modules/graphics/opengl/Shader.cpp
index 6bdff33e1..0900a94f9 100644
--- a/src/modules/graphics/opengl/Shader.cpp
+++ b/src/modules/graphics/opengl/Shader.cpp
@@ -753,7 +753,7 @@ void Shader::checkSetBuiltinUniforms()
 		checkSetPointSize(gl.getPointSize());
 
 		const Matrix4 &curxform = gl.matrices.transform.back();
-		const Matrix4 &curproj = gl.matrices.projection.back();
+		const Matrix4 &curproj = gl.matrices.projection;
 
 		TemporaryAttacher attacher(this);