diff --git a/docs/labwc-config.5.scd b/docs/labwc-config.5.scd
index 1c160a45..8742dd6a 100644
--- a/docs/labwc-config.5.scd
+++ b/docs/labwc-config.5.scd
@@ -481,7 +481,7 @@ extending outward from the snapped edge.
 	The name of the Openbox theme to use. It is not set by default.
 
 *<theme><icon>*
-	The name of the icon theme to use. It is not set by default.
+	The name of the icon theme to use. Inherits *<theme><name>* if not set.
 
 *<theme><fallbackAppIcon>*
 	The name of the icon to use as a fallback when the application icon
diff --git a/src/config/rcxml.c b/src/config/rcxml.c
index 0dfdc604..90fcfe15 100644
--- a/src/config/rcxml.c
+++ b/src/config/rcxml.c
@@ -1683,6 +1683,10 @@ post_processing(void)
 		rc.fallback_app_icon_name = xstrdup("labwc");
 	}
 
+	if (!rc.icon_theme_name && rc.theme_name) {
+		rc.icon_theme_name = xstrdup(rc.theme_name);
+	}
+
 	if (!rc.title_layout_loaded) {
 #if HAVE_LIBSFDO
 		fill_title_layout("icon:iconify,max,close");