diff --git a/libuavcan/include/uavcan/marshal/float_spec.hpp b/libuavcan/include/uavcan/marshal/float_spec.hpp
index aa2604c9d5..ef3e93b884 100644
--- a/libuavcan/include/uavcan/marshal/float_spec.hpp
+++ b/libuavcan/include/uavcan/marshal/float_spec.hpp
@@ -50,7 +50,9 @@ class UAVCAN_EXPORT IEEE754Converter
          * Some compilers may have is_iec559 to be defined false despite the fact that IEEE754 is supported.
          * An acceptable workaround would be to put an #ifdef here.
          */
+#if UAVCAN_CPP_VERSION >= UAVCAN_CPP11
         StaticAssert<std::numeric_limits<typename NativeFloatSelector<BitLen>::Type>::is_iec559>::check();
+#endif
     }
 
 public: