diff --git a/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationPrimitiveOrWrapperValueExtractor.java b/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationPrimitiveOrWrapperValueExtractor.java
index bad97d6..f63cfae 100644
--- a/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationPrimitiveOrWrapperValueExtractor.java
+++ b/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationPrimitiveOrWrapperValueExtractor.java
@@ -78,19 +78,12 @@ public class ConfigurationPrimitiveOrWrapperValueExtractor implements Configurat
 					+ key);
 
 		} catch (ConversionException cause) {
-			validate(prefix, key, configuration, cause);
-			value = null;
+			throw cause;
 		}
 
 		return value;
 	}
 
-	private void validate(String prefix, String key, Configuration configuration, ConversionException cause) {
-		if (!Strings.isEmpty(configuration.getString(prefix + key))) {
-			throw cause;
-		}
-	}
-
 	@Override
 	public boolean isSupported(Field field) {
 		return field.getType().isPrimitive() || wrappers.contains(field.getType());
diff --git a/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationStringValueExtractor.java b/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationStringValueExtractor.java
index 0a9362d..2d5def9 100644
--- a/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationStringValueExtractor.java
+++ b/impl/core/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConfigurationStringValueExtractor.java
@@ -51,13 +51,7 @@ public class ConfigurationStringValueExtractor implements ConfigurationValueExtr
 
 	@Override
 	public Object getValue(String prefix, String key, Field field, Configuration configuration) throws Exception {
-		String value = configuration.getString(prefix + key);
-
-		if (Strings.isEmpty(value)) {
-			value = null;
-		}
-
-		return value;
+		return configuration.getString(prefix + key);
 	}
 
 	@Override
--
libgit2 0.21.2