diff --git a/panda/src/egldisplay/eglGraphicsWindow.cxx b/panda/src/egldisplay/eglGraphicsWindow.cxx
index fe96f6d378..06250ec2a1 100644
--- a/panda/src/egldisplay/eglGraphicsWindow.cxx
+++ b/panda/src/egldisplay/eglGraphicsWindow.cxx
@@ -827,7 +827,7 @@ set_wm_properties(const WindowProperties &properties, bool already_mapped) {
         size_hints_p->height = properties.get_y_size();
         size_hints_p->flags |= USSize;
 
-        if (properties.has_fixed_size()) {
+        if (properties.get_fixed_size()) {
           size_hints_p->min_width = properties.get_x_size();
           size_hints_p->min_height = properties.get_y_size();
           size_hints_p->max_width = properties.get_x_size();
diff --git a/panda/src/x11display/x11GraphicsWindow.cxx b/panda/src/x11display/x11GraphicsWindow.cxx
index e6bd7a15e9..ccdef52f1f 100644
--- a/panda/src/x11display/x11GraphicsWindow.cxx
+++ b/panda/src/x11display/x11GraphicsWindow.cxx
@@ -948,7 +948,7 @@ set_wm_properties(const WindowProperties &properties, bool already_mapped) {
         size_hints_p->height = properties.get_y_size();
         size_hints_p->flags |= USSize;
 
-        if (properties.has_fixed_size()) {
+        if (properties.get_fixed_size()) {
           size_hints_p->min_width = properties.get_x_size();
           size_hints_p->min_height = properties.get_y_size();
           size_hints_p->max_width = properties.get_x_size();