diff --git a/src/common/platform/posix/cocoa/i_video.mm b/src/common/platform/posix/cocoa/i_video.mm
index 2950f7e352..bfefd0deca 100644
--- a/src/common/platform/posix/cocoa/i_video.mm
+++ b/src/common/platform/posix/cocoa/i_video.mm
@@ -519,7 +519,6 @@ static SystemBaseFrameBuffer* frameBuffer;
 
 
 SystemBaseFrameBuffer::SystemBaseFrameBuffer(void*, const bool fullscreen)
-: DFrameBuffer(vid_defwidth, vid_defheight)
 , m_fullscreen(false)
 , m_hiDPI(false)
 , m_window(nullptr)
diff --git a/src/common/platform/posix/sdl/gl_sysfb.h b/src/common/platform/posix/sdl/gl_sysfb.h
index e9491d098c..f6ed350f8a 100644
--- a/src/common/platform/posix/sdl/gl_sysfb.h
+++ b/src/common/platform/posix/sdl/gl_sysfb.h
@@ -11,7 +11,7 @@ class SystemBaseFrameBuffer : public DFrameBuffer
 
 public:
 	// this must have the same parameters as the Windows version, even if they are not used!
-	SystemBaseFrameBuffer (void *hMonitor, bool fullscreen);
+	SystemBaseFrameBuffer(void *hMonitor, bool fullscreen);
 
 	bool IsFullscreen() override;
 
diff --git a/src/common/platform/posix/sdl/sdlglvideo.cpp b/src/common/platform/posix/sdl/sdlglvideo.cpp
index 2bd54c2aa3..7c2da2d74c 100644
--- a/src/common/platform/posix/sdl/sdlglvideo.cpp
+++ b/src/common/platform/posix/sdl/sdlglvideo.cpp
@@ -200,7 +200,7 @@ public:
 	SDLVideo ();
 	~SDLVideo ();
 
-	DFrameBuffer *CreateFrameBuffer (bool fullscreen);
+	DFrameBuffer *CreateFrameBuffer(bool fullscreen);
 
 private:
 #ifdef HAVE_VULKAN
@@ -436,7 +436,7 @@ SDLVideo::~SDLVideo ()
 #endif
 }
 
-DFrameBuffer *SDLVideo::CreateFrameBuffer (bool fullscreen)
+DFrameBuffer *SDLVideo::CreateFrameBuffer(bool fullscreen)
 {
 	SystemBaseFrameBuffer *fb = nullptr;
 
@@ -491,8 +491,7 @@ IVideo *gl_CreateVideo()
 
 // FrameBuffer Implementation -----------------------------------------------
 
-SystemBaseFrameBuffer::SystemBaseFrameBuffer (void *, bool fullscreen)
-: DFrameBuffer (vid_defwidth, vid_defheight)
+SystemBaseFrameBuffer::SystemBaseFrameBuffer(void *, bool fullscreen)
 {
 	if (Priv::window != nullptr)
 	{
@@ -656,7 +655,7 @@ SystemGLFrameBuffer::SystemGLFrameBuffer(void *hMonitor, bool fullscreen)
 	}
 }
 
-SystemGLFrameBuffer::~SystemGLFrameBuffer ()
+SystemGLFrameBuffer::~SystemGLFrameBuffer()
 {
 	if (Priv::window)
 	{
diff --git a/src/common/rendering/v_framebuffer.cpp b/src/common/rendering/v_framebuffer.cpp
index c0ebb4c25d..ad67fa73fd 100644
--- a/src/common/rendering/v_framebuffer.cpp
+++ b/src/common/rendering/v_framebuffer.cpp
@@ -70,9 +70,8 @@ EXTERN_CVAR(Int, screenblocks)
 //
 //==========================================================================
 
-DFrameBuffer::DFrameBuffer (int width, int height)
+DFrameBuffer::DFrameBuffer()
 {
-	SetSize(width, height);
 }
 
 DFrameBuffer::~DFrameBuffer()
diff --git a/src/common/rendering/v_video.cpp b/src/common/rendering/v_video.cpp
index 11af0e65e1..7426e65e98 100644
--- a/src/common/rendering/v_video.cpp
+++ b/src/common/rendering/v_video.cpp
@@ -146,8 +146,7 @@ class DDummyFrameBuffer : public DFrameBuffer
 {
 	typedef DFrameBuffer Super;
 public:
-	DDummyFrameBuffer (int width, int height)
-		: DFrameBuffer (0, 0)
+	DDummyFrameBuffer(int width, int height)
 	{
 		SetVirtualSize(width, height);
 	}
@@ -372,9 +371,9 @@ void V_InitScreenSize ()
 	vid_defheight = height;
 }
 
-void V_InitScreen()
+void V_InitScreen(int width, int height)
 {
-	screen = new DDummyFrameBuffer (vid_defwidth, vid_defheight);
+	screen = new DDummyFrameBuffer(width, height);
 }
 
 void V_Init2()
diff --git a/src/common/rendering/v_video.h b/src/common/rendering/v_video.h
index db61130d0d..2826e312f6 100644
--- a/src/common/rendering/v_video.h
+++ b/src/common/rendering/v_video.h
@@ -156,7 +156,7 @@ public:
 	double scaleFactor = 1.;
 
 public:
-	DFrameBuffer (int width=1, int height=1);
+	DFrameBuffer();
 	virtual ~DFrameBuffer();
 	virtual void InitializeState() = 0;	// For stuff that needs 'screen' set.
 	virtual bool IsVulkan() { return false; }
@@ -303,7 +303,7 @@ EXTERN_CVAR (Float, vid_gamma)
 
 // Allocates buffer screens, call before R_Init.
 void V_InitScreenSize();
-void V_InitScreen();
+void V_InitScreen(int, int);
 
 // Initializes graphics mode for the first time.
 void V_Init2 ();
diff --git a/src/d_main.cpp b/src/d_main.cpp
index 36447ef893..ce09abd200 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -195,6 +195,8 @@ EXTERN_CVAR (Bool, sv_unlimited_pickup)
 EXTERN_CVAR (Bool, r_drawplayersprites)
 EXTERN_CVAR (Bool, show_messages)
 EXTERN_CVAR(Bool, ticker)
+EXTERN_CVAR(Int, vid_defwidth)
+EXTERN_CVAR(Int, vid_defheight)
 
 extern bool setmodeneeded;
 extern bool demorecording;
@@ -3114,7 +3116,7 @@ static int D_InitGame(const FIWADInfo* iwad_info, TArray<FString>& allwads, TArr
 	{
 		V_InitScreenSize();
 		// This allocates a dummy framebuffer as a stand-in until V_Init2 is called.
-		V_InitScreen ();
+		V_InitScreen (vid_defwidth, vid_defheight);
 
 		if (StartScreen != nullptr)
 		{