diff --git a/src/strands/ir_builders.js b/src/strands/ir_builders.js
index 127d19e235..b9096d0f85 100644
--- a/src/strands/ir_builders.js
+++ b/src/strands/ir_builders.js
@@ -164,7 +164,7 @@ export function memberAccessNode(strandsContext, parentNode, componentNode, memb
 }
 
 export function structInstanceNode(strandsContext, structTypeInfo, identifier, dependsOn) {
-  const { cfg, dag, } = strandsContext;
+  const { cfg, dag } = strandsContext;
   if (dependsOn.length === 0) {
     for (const prop of structTypeInfo.properties) {
       const typeInfo = prop.dataType;
@@ -202,7 +202,7 @@ function mapPrimitiveDepsToIDs(strandsContext, typeInfo, dependsOn) {
   let calculatedDimensions = 0;
   let originalNodeID = null;
   for (const dep of inputs.flat(Infinity)) {
-    if (dep instanceof StrandsNode) {
+    if (dep && dep.isStrandsNode) {
       const node = DAG.getNodeDataFromID(dag, dep.id);
       originalNodeID = dep.id;
       baseType = node.baseType;
diff --git a/src/strands/strands_node.js b/src/strands/strands_node.js
index bfa58d0c89..7d69b4438f 100644
--- a/src/strands/strands_node.js
+++ b/src/strands/strands_node.js
@@ -7,6 +7,7 @@ export class StrandsNode {
     this.id = id;
     this.strandsContext = strandsContext;
     this.dimension = dimension;
+    this.isStrandsNode = true;
 
     // Store original identifier for varying variables
     const dag = this.strandsContext.dag;