diff --git a/src/metric_value.hpp b/src/metric_value.hpp
index d01ac4e..6c1d3da 100644
--- a/src/metric_value.hpp
+++ b/src/metric_value.hpp
@@ -9,4 +9,10 @@
     std::string metadata;
     double value;
     uint64_t timestamp;
+
+    MetricValue(std::string_view idIn, std::string_view metadataIn,
+                double valueIn, uint64_t timestampIn) :
+        id(idIn),
+        metadata(metadataIn), value(valueIn), timestamp(timestampIn)
+    {}
 };
diff --git a/src/types/error_message.hpp b/src/types/error_message.hpp
index de27772..c40d1f8 100644
--- a/src/types/error_message.hpp
+++ b/src/types/error_message.hpp
@@ -8,4 +8,8 @@
 {
     ErrorType error;
     std::string arg0;
+
+    ErrorMessage(ErrorType errorIn, std::string_view arg0In) :
+        error(errorIn), arg0(arg0In)
+    {}
 };
diff --git a/src/utils/ensure.hpp b/src/utils/ensure.hpp
index 8f266ab..8c4fc99 100644
--- a/src/utils/ensure.hpp
+++ b/src/utils/ensure.hpp
@@ -18,11 +18,7 @@
     Ensure(F functor) : functor(std::move(functor))
     {}
 
-    Ensure(Ensure&& other) : functor(std::move(other.functor))
-    {
-        other.functor = std::nullopt;
-    }
-
+    Ensure(Ensure&& other) = delete;
     Ensure(const Ensure&) = delete;
 
     ~Ensure()
@@ -38,12 +34,7 @@
         return *this;
     }
 
-    Ensure& operator=(Ensure&& other)
-    {
-        clear();
-        std::swap(functor, other.functor);
-        return *this;
-    }
+    Ensure& operator=(Ensure&& other) = delete;
 
     Ensure& operator=(std::nullptr_t)
     {