diff --git a/include/fmt/compile.h b/include/fmt/compile.h
index ac1489a9..7832dd5c 100644
--- a/include/fmt/compile.h
+++ b/include/fmt/compile.h
@@ -22,10 +22,6 @@
 #  endif
 #endif
 
-#ifndef FMT_ENABLE_FALLBACK_TO_RUNTIME_API
-#  define FMT_ENABLE_FALLBACK_TO_RUNTIME_API 1
-#endif
-
 FMT_BEGIN_NAMESPACE
 namespace detail {
 
@@ -708,12 +704,6 @@ constexpr auto compile(S format_str) {
     constexpr auto result =
         detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
             format_str);
-#  if !FMT_ENABLE_FALLBACK_TO_RUNTIME_API
-    static_assert(!std::is_same<remove_cvref_t<decltype(result)>,
-                                detail::unknown_format>(),
-                  "format string is invalid for compile-time API, "
-                  "and fallback to runtime API is disabled");
-#  endif
     return result;
   }
 }
diff --git a/test/compile-test.cc b/test/compile-test.cc
index 3c377c90..84b75777 100644
--- a/test/compile-test.cc
+++ b/test/compile-test.cc
@@ -229,7 +229,6 @@ TEST(CompileTest, TextAndArg) {
   EXPECT_EQ("42!", fmt::format(FMT_COMPILE("{}!"), 42));
 }
 
-#  if FMT_ENABLE_FALLBACK_TO_RUNTIME_API
 TEST(CompileTest, UnknownFormatFallback) {
   EXPECT_EQ(" 42 ",
             fmt::format(FMT_COMPILE("{name:^4}"), fmt::arg("name", 42)));
@@ -246,7 +245,6 @@ TEST(CompileTest, UnknownFormatFallback) {
   EXPECT_EQ(buffer + 4, result.out);
   EXPECT_EQ(" 42 ", fmt::string_view(buffer, 4));
 }
-#  endif
 
 TEST(CompileTest, Empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
 #endif