diff --git a/src/rcore.c b/src/rcore.c
index 013ea434a..099bbe9c8 100644
--- a/src/rcore.c
+++ b/src/rcore.c
@@ -827,6 +827,8 @@ int GetScreenHeight(void)
 // Get current render width which is equal to screen width*dpi scale
 int GetRenderWidth(void)
 {
+    if (CORE.Window.usingFbo) return CORE.Window.currentFbo.width;
+
     int width = 0;
 #if defined(__APPLE__)
     Vector2 scale = GetWindowScaleDPI();
@@ -840,6 +842,8 @@ int GetRenderWidth(void)
 // Get current screen height which is equal to screen height*dpi scale
 int GetRenderHeight(void)
 {
+    if (CORE.Window.usingFbo) return CORE.Window.currentFbo.height;
+
     int height = 0;
 #if defined(__APPLE__)
     Vector2 scale = GetWindowScaleDPI();