diff --git a/.changeset/cool-maps-smash.md b/.changeset/cool-maps-smash.md
new file mode 100644
index 00000000..6288e9a4
--- /dev/null
+++ b/.changeset/cool-maps-smash.md
@@ -0,0 +1,5 @@
+---
+"@delvtech/evm-client": patch
+---
+
+Fix param prep for contract calls with single params
diff --git a/packages/evm-client/src/contract/utils/friendlyToArray.ts b/packages/evm-client/src/contract/utils/friendlyToArray.ts
index 7c873e24..6859d5bb 100644
--- a/packages/evm-client/src/contract/utils/friendlyToArray.ts
+++ b/packages/evm-client/src/contract/utils/friendlyToArray.ts
@@ -76,9 +76,9 @@ export function friendlyToArray<
     parameters = (abiEntry as any)[kind];
   }
 
-  // Single or no parameters
-  if (parameters.length <= 1) {
-    return [] as AbiArrayType<TAbi, TItemType, TName, TParameterKind>;
+  // No parameters
+  if (!parameters.length) {
+    return [value] as AbiArrayType<TAbi, TItemType, TName, TParameterKind>;
   }
 
   const valueObject: Record<string, unknown> =