1 files changed, 1 insertions, 1 deletions
diff --git a/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts b/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts
index 3a2ad410f..68f212f79 100644
--- a/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts
+++ b/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts
@@ -59,7 +59,7 @@ export class StaticBytes extends AbstractDataTypes.Blob {
 
     private _sanityCheckValue(value: string | Buffer): void {
         if (typeof value === 'string') {
-            if (!value.startsWith('0x')) {
+            if (!_.startsWith(value, '0x')) {
                 throw new Error(`Tried to encode non-hex value. Value must inlcude '0x' prefix.`);
             } else if (value.length % 2 !== 0) {
                 throw new Error(`Tried to assign ${value}, which is contains a half-byte. Use full bytes only.`);