diff --git a/app/streaming/streamutils.cpp b/app/streaming/streamutils.cpp
index 964b5d8b..c38eddbd 100644
--- a/app/streaming/streamutils.cpp
+++ b/app/streaming/streamutils.cpp
@@ -32,6 +32,22 @@ void StreamUtils::scaleSourceToDestinationSurface(SDL_Rect* src, SDL_Rect* dst)
     }
 }
 
+void StreamUtils::screenSpaceToNormalizedDeviceCoords(SDL_FRect* rect, int viewportWidth, int viewportHeight)
+{
+    rect->x = (rect->x / (viewportWidth / 2.0f)) - 1.0f;
+    rect->y = (rect->y / (viewportHeight / 2.0f)) - 1.0f;
+    rect->w = rect->w / (viewportWidth / 2.0f);
+    rect->h = rect->h / (viewportHeight / 2.0f);
+}
+
+void StreamUtils::screenSpaceToNormalizedDeviceCoords(SDL_Rect* src, SDL_FRect* dst, int viewportWidth, int viewportHeight)
+{
+    dst->x = ((float)src->x / (viewportWidth / 2.0f)) - 1.0f;
+    dst->y = ((float)src->y / (viewportHeight / 2.0f)) - 1.0f;
+    dst->w = (float)src->w / (viewportWidth / 2.0f);
+    dst->h = (float)src->h / (viewportHeight / 2.0f);
+}
+
 int StreamUtils::getDisplayRefreshRate(SDL_Window* window)
 {
     int displayIndex = SDL_GetWindowDisplayIndex(window);
diff --git a/app/streaming/streamutils.h b/app/streaming/streamutils.h
index db6bc779..d4d72a6b 100644
--- a/app/streaming/streamutils.h
+++ b/app/streaming/streamutils.h
@@ -2,6 +2,17 @@
 
 #include <SDL.h>
 
+// SDL_FRect wasn't added until 2.0.10
+#if !SDL_VERSION_ATLEAST(2, 0, 10)
+typedef struct SDL_FRect
+{
+    float x;
+    float y;
+    float w;
+    float h;
+} SDL_FRect;
+#endif
+
 class StreamUtils
 {
 public:
@@ -11,6 +22,12 @@ public:
     static
     void scaleSourceToDestinationSurface(SDL_Rect* src, SDL_Rect* dst);
 
+    static
+    void screenSpaceToNormalizedDeviceCoords(SDL_FRect* rect, int viewportWidth, int viewportHeight);
+
+    static
+    void screenSpaceToNormalizedDeviceCoords(SDL_Rect* src, SDL_FRect* dst, int viewportWidth, int viewportHeight);
+
     static
     bool getRealDesktopMode(int displayIndex, SDL_DisplayMode* mode);
 
diff --git a/app/streaming/video/ffmpeg-renderers/eglvid.cpp b/app/streaming/video/ffmpeg-renderers/eglvid.cpp
index 4895b808..407bacfa 100644
--- a/app/streaming/video/ffmpeg-renderers/eglvid.cpp
+++ b/app/streaming/video/ffmpeg-renderers/eglvid.cpp
@@ -214,13 +214,7 @@ void EGLRenderer::renderOverlay(Overlay::OverlayType type)
             free(packedPixelData);
         }
 
-        // SDL_FRect wasn't added until 2.0.10
-        struct {
-            float x;
-            float y;
-            float w;
-            float h;
-        } overlayRect = {};
+        SDL_FRect overlayRect;
 
         // These overlay positions differ from the other renderers because OpenGL
         // places the origin in the lower-left corner instead of the upper-left.
@@ -243,12 +237,7 @@ void EGLRenderer::renderOverlay(Overlay::OverlayType type)
         SDL_FreeSurface(newSurface);
 
         // Convert screen space to normalized device coordinates
-        overlayRect.x /= m_ViewportWidth / 2;
-        overlayRect.w /= m_ViewportWidth / 2;
-        overlayRect.y /= m_ViewportHeight / 2;
-        overlayRect.h /= m_ViewportHeight / 2;
-        overlayRect.x -= 1.0f;
-        overlayRect.y -= 1.0f;
+        StreamUtils::screenSpaceToNormalizedDeviceCoords(&overlayRect, m_ViewportWidth, m_ViewportHeight);
 
         OVERLAY_VERTEX verts[] =
         {