diff --git a/svg.cpp b/svg.cpp
index f090dcf64..f2a13c7c4 100644
--- a/svg.cpp
+++ b/svg.cpp
@@ -211,7 +211,7 @@ class SvgPrivate
                 s_renderers[path] = renderer;
             }
 
-            if (size != QSizeF()) {
+            if (size == QSizeF()) {
                 size = renderer->defaultSize();
             }
         }