diff --git a/.changeset/shiny-cameras-sparkle.md b/.changeset/shiny-cameras-sparkle.md
new file mode 100644
index 000000000..e7f3dc2f9
--- /dev/null
+++ b/.changeset/shiny-cameras-sparkle.md
@@ -0,0 +1,5 @@
+---
+'@lion/overlays': patch
+---
+
+If a content slot cannot be found, OverlayMixin should check if there is a contentNode imperatively passed through the config.
diff --git a/packages/overlays/src/OverlayMixin.js b/packages/overlays/src/OverlayMixin.js
index 39f528fa3..f656ab722 100644
--- a/packages/overlays/src/OverlayMixin.js
+++ b/packages/overlays/src/OverlayMixin.js
@@ -183,9 +183,9 @@ export const OverlayMixinImplementation = superclass =>
 
     get _overlayContentNode() {
       if (!this._cachedOverlayContentNode) {
-        this._cachedOverlayContentNode = Array.from(this.children).find(
-          child => child.slot === 'content',
-        );
+        this._cachedOverlayContentNode =
+          Array.from(this.children).find(child => child.slot === 'content') ||
+          this.config.contentNode;
       }
       return this._cachedOverlayContentNode;
     }