diff --git a/source/poodinis/dependency.d b/source/poodinis/dependency.d
index 7c19c16..79c6be2 100644
--- a/source/poodinis/dependency.d
+++ b/source/poodinis/dependency.d
@@ -111,7 +111,7 @@ class DependencyContainer {
 		if (resolveType == qualifierType) {
 			if (candidates.length > 1) {
 				string candidateList = candidates.toConcreteTypeListString();
-				throw new ResolveException("Multiple qualified candidates available: " ~ candidateList ~ ". Please specify qualifier.", resolveType);
+				throw new ResolveException("Multiple qualified candidates available: " ~ candidateList ~ ". Please use a qualifier.", resolveType);
 			}
 			
 			return candidates[0];
diff --git a/source/poodinis/registration.d b/source/poodinis/registration.d
index 68916f1..c36848b 100644
--- a/source/poodinis/registration.d
+++ b/source/poodinis/registration.d
@@ -123,7 +123,7 @@ public Registration existingInstance(Registration registration, Object instance)
 public string toConcreteTypeListString(Registration[] registrations) {
 	auto concreteTypeListString = "";
 	foreach (registration ; registrations) {
-		if (!concreteTypeListString.length) {
+		if (concreteTypeListString.length > 0) {
 			concreteTypeListString ~= ", ";
 		}
 		concreteTypeListString ~= registration.instantiatableType.toString();