diff --git a/panel-plugin/netload.c b/panel-plugin/netload.c
index cef1c56..11a969c 100644
--- a/panel-plugin/netload.c
+++ b/panel-plugin/netload.c
@@ -558,9 +558,13 @@ static void set_progressbar_csscolor(GtkWidget* pbar, GdkRGBA* color)
     GtkCssProvider *css_provider;
     gchar * css;
 #if GTK_CHECK_VERSION (3, 20, 0)
-    css = g_strdup_printf("progressbar trough { min-width: 4px; min-height: 4px; } \
-                           progressbar progress { min-width: 4px; min-height: 4px; \
+    gchar * cssminsizes = "min-width: 4px; min-height: 0px";
+    if (gtk_orientable_get_orientation(GTK_ORIENTABLE(pbar)) == GTK_ORIENTATION_HORIZONTAL)
+        cssminsizes = "min-width: 0px; min-height: 4px";
+    css = g_strdup_printf("progressbar trough { %s } \
+                           progressbar progress { %s ; \
                                                   background-color: %s; background-image: none; }",
+                          cssminsizes, cssminsizes,
 #else
     css = g_strdup_printf(".progressbar { background-color: %s; background-image: none; }",
 #endif