diff --git a/src/serialize.h b/src/serialize.h
index 4a6c5e26e4f..0a43913f83f 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -142,24 +142,28 @@ inline uint64_t ser_double_to_uint64(double x)
 {
     uint64_t tmp;
     std::memcpy(&tmp, &x, sizeof(x));
+    static_assert(sizeof(tmp) == sizeof(x), "double and uint64_t assumed to have the same size");
     return tmp;
 }
 inline uint32_t ser_float_to_uint32(float x)
 {
     uint32_t tmp;
     std::memcpy(&tmp, &x, sizeof(x));
+    static_assert(sizeof(tmp) == sizeof(x), "float and uint32_t assumed to have the same size");
     return tmp;
 }
 inline double ser_uint64_to_double(uint64_t y)
 {
     double tmp;
     std::memcpy(&tmp, &y, sizeof(y));
+    static_assert(sizeof(tmp) == sizeof(y), "double and uint64_t assumed to have the same size");
     return tmp;
 }
 inline float ser_uint32_to_float(uint32_t y)
 {
     float tmp;
     std::memcpy(&tmp, &y, sizeof(y));
+    static_assert(sizeof(tmp) == sizeof(y), "float and uint32_t assumed to have the same size");
     return tmp;
 }