diff --git a/include/fpm/fixed.hpp b/include/fpm/fixed.hpp
index e2e71bf..e46dc64 100644
--- a/include/fpm/fixed.hpp
+++ b/include/fpm/fixed.hpp
@@ -390,7 +390,7 @@ struct numeric_limits<fpm::fixed<B,I,F,R>>
     static constexpr std::float_denorm_style has_denorm = std::denorm_absent;
     static constexpr bool has_denorm_loss = false;
     static constexpr std::float_round_style round_style = std::round_to_nearest;
-    static constexpr bool is_iec_559 = false;
+    static constexpr bool is_iec559 = false;
     static constexpr bool is_bounded = true;
     static constexpr bool is_modulo = std::numeric_limits<B>::is_modulo;
     static constexpr int digits = std::numeric_limits<B>::digits;
@@ -459,7 +459,7 @@ constexpr bool numeric_limits<fpm::fixed<B,I,F,R>>::has_denorm_loss;
 template <typename B, typename I, unsigned int F, bool R>
 constexpr std::float_round_style numeric_limits<fpm::fixed<B,I,F,R>>::round_style;
 template <typename B, typename I, unsigned int F, bool R>
-constexpr bool numeric_limits<fpm::fixed<B,I,F,R>>::is_iec_559;
+constexpr bool numeric_limits<fpm::fixed<B,I,F,R>>::is_iec559;
 template <typename B, typename I, unsigned int F, bool R>
 constexpr bool numeric_limits<fpm::fixed<B,I,F,R>>::is_bounded;
 template <typename B, typename I, unsigned int F, bool R>
diff --git a/tests/customizations.cpp b/tests/customizations.cpp
index e27c427..498bd01 100644
--- a/tests/customizations.cpp
+++ b/tests/customizations.cpp
@@ -98,7 +98,7 @@ TYPED_TEST(customizations, numeric_limits)
     EXPECT_EQ(L::has_denorm, std::denorm_absent);
     EXPECT_EQ(L::has_denorm_loss, false);
     EXPECT_EQ(L::round_style, std::round_to_nearest);
-    EXPECT_EQ(L::is_iec_559, false);
+    EXPECT_EQ(L::is_iec559, false);
     EXPECT_EQ(L::is_bounded, true);
     EXPECT_EQ(L::is_modulo, false);
     EXPECT_EQ(L::digits, TL::digits());