diff --git a/src/fmt/compile.h b/src/fmt/compile.h
index a1fb7d2935..af76507f07 100644
--- a/src/fmt/compile.h
+++ b/src/fmt/compile.h
@@ -61,7 +61,8 @@ const T& first(const T& value, const Tail&...) {
   return value;
 }
 
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction) && (FMT_CPLUSPLUS >= 201703L) && !FMT_ICC_VERSION
+// LAMMPS customization: only use 'if constexpr' with C++17
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction) && (FMT_CPLUSPLUS >= 201703L)
 template <typename... Args> struct type_list {};
 
 // Returns a reference to the argument at index N from [first, rest...].