diff --git a/accurest-core/src/main/groovy/io/codearte/accurest/util/NamesUtil.groovy b/accurest-core/src/main/groovy/io/codearte/accurest/util/NamesUtil.groovy
index 713270ce06..1986d45a9a 100644
--- a/accurest-core/src/main/groovy/io/codearte/accurest/util/NamesUtil.groovy
+++ b/accurest-core/src/main/groovy/io/codearte/accurest/util/NamesUtil.groovy
@@ -51,6 +51,6 @@ class NamesUtil {
 	}
 
 	static String directoryToPackage(String directory) {
-		return directory.replace(File.separator, '.')
+		return directory.replace(File.separator, '.').replace('-', '_')
 	}
 }