diff --git a/src/render/software/SDL_render_sw.c b/src/render/software/SDL_render_sw.c
index 98e46e939c..3a4d3c6877 100644
--- a/src/render/software/SDL_render_sw.c
+++ b/src/render/software/SDL_render_sw.c
@@ -220,9 +220,17 @@ static bool SW_QueueFillRects(SDL_Renderer *renderer, SDL_RenderCommand *cmd, co
 
     for (i = 0; i < count; i++, verts++, rects++) {
         verts->x = (int)rects->x;
+        verts->w = (int)rects->w;
+        if (verts->w < 0) {
+            verts->w = -verts->w;
+            verts->x -= verts->w;
+        }
         verts->y = (int)rects->y;
-        verts->w = SDL_max((int)rects->w, 1);
-        verts->h = SDL_max((int)rects->h, 1);
+        verts->h = (int)rects->h;
+        if (verts->h < 0) {
+            verts->h = -verts->h;
+            verts->y -= verts->h;
+        }
     }
 
     return true;
diff --git a/test/testautomation_render.c b/test/testautomation_render.c
index 3bf8662baa..a35ce9b8e3 100644
--- a/test/testautomation_render.c
+++ b/test/testautomation_render.c
@@ -124,16 +124,23 @@ static int SDLCALL render_testPrimitives(void *arg)
     rect.y = 0.0f;
     rect.w = 40.0f;
     rect.h = 80.0f;
-
     CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 13, 73, 200, SDL_ALPHA_OPAQUE))
     CHECK_FUNC(SDL_RenderFillRect, (renderer, &rect))
 
-    /* Draw a rectangle. */
+    /* Draw a rectangle with negative width and height. */
+    rect.x = 10.0f + 60.0f;
+    rect.y = 10.0f + 40.0f;
+    rect.w = -60.0f;
+    rect.h = -40.0f;
+    CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 200, 0, 100, SDL_ALPHA_OPAQUE))
+    CHECK_FUNC(SDL_RenderFillRect, (renderer, &rect))
+
+    /* Draw a rectangle with zero width and height. */
     rect.x = 10.0f;
     rect.y = 10.0f;
-    rect.w = 60.0f;
-    rect.h = 40.0f;
-    CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 200, 0, 100, SDL_ALPHA_OPAQUE))
+    rect.w = 0.0f;
+    rect.h = 0.0f;
+    CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 255, 0, 0, SDL_ALPHA_OPAQUE))
     CHECK_FUNC(SDL_RenderFillRect, (renderer, &rect))
 
     /* Draw some points like so: