diff --git a/.changeset/chatty-brooms-draw.md b/.changeset/chatty-brooms-draw.md
new file mode 100644
index 0000000000..05e882c6ed
--- /dev/null
+++ b/.changeset/chatty-brooms-draw.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Updated `nativeCurrency` for `defichainEvmTestnet` and `defichainEvm`.
diff --git a/src/chains/definitions/defichainEvm.ts b/src/chains/definitions/defichainEvm.ts
index 7b28f00db9..3c24cdf6aa 100644
--- a/src/chains/definitions/defichainEvm.ts
+++ b/src/chains/definitions/defichainEvm.ts
@@ -7,7 +7,7 @@ export const defichainEvm = /*#__PURE__*/ defineChain({
   nativeCurrency: {
     name: 'DeFiChain',
     symbol: 'DFI',
-    decimals: 8,
+    decimals: 18,
   },
   rpcUrls: {
     default: {
diff --git a/src/chains/definitions/defichainEvmTestnet.ts b/src/chains/definitions/defichainEvmTestnet.ts
index a03f588adc..7b80c84404 100644
--- a/src/chains/definitions/defichainEvmTestnet.ts
+++ b/src/chains/definitions/defichainEvmTestnet.ts
@@ -7,7 +7,7 @@ export const defichainEvmTestnet = /*#__PURE__*/ defineChain({
   nativeCurrency: {
     name: 'DeFiChain',
     symbol: 'DFI',
-    decimals: 8,
+    decimals: 18,
   },
   rpcUrls: {
     default: {