diff --git a/include/verilated_saif_c.h b/include/verilated_saif_c.h
index 95d4efa1e..577591269 100644
--- a/include/verilated_saif_c.h
+++ b/include/verilated_saif_c.h
@@ -75,7 +75,7 @@ public:
 
     template <typename DataType>
     VL_ATTR_ALWINLINE void emitData(uint64_t time, DataType newval, uint32_t bits) {
-        static_assert(std::is_integral<DataType>::value);
+        static_assert(std::is_integral<DataType>::value, "The emitted value must be of integral type");
 
         uint64_t dt = time - m_lastTime;
         for (size_t i = 0; i < std::min(m_width, bits); i++) {