diff --git a/.vscode/acm.code-snippets b/.vscode/acm.code-snippets
index 432e271..f87f046 100644
--- a/.vscode/acm.code-snippets
+++ b/.vscode/acm.code-snippets
@@ -72,7 +72,7 @@
 			"inline TResult mmax(CRP(T, v), const Args &... args) { return max<TResult>(v, mmax(args...)); }",
 			"inline ll gcd(ll a, ll b)",
 			"{",
-			"    for (; b; swap(a, b)) a = a % b;",
+			"    for (; b; swap(a, b)) a %= b;",
 			"    return a;",
 			"}",
 			"inline ll fpow(ll a, ll b, ll m)",
diff --git a/tmpl.cpp b/tmpl.cpp
index 777489d..1e0c9dc 100644
--- a/tmpl.cpp
+++ b/tmpl.cpp
@@ -51,7 +51,7 @@ template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
 inline TResult mmax(CRP(T, v), const Args &... args) { return max<TResult>(v, mmax(args...)); }
 inline ll gcd(ll a, ll b)
 {
-    for (; b; swap(a, b)) a = a % b;
+    for (; b; swap(a, b)) a %= b;
     return a;
 }
 inline ll fpow(ll a, ll b, ll m)