diff --git a/unsafe/pom.xml b/unsafe/pom.xml
index 62c6354f1e2032ed76bc68a9dff10db1fe3f67dc..dd2ae6457f0b9daba89678ce12f9ef2a7f54255c 100644
--- a/unsafe/pom.xml
+++ b/unsafe/pom.xml
@@ -80,7 +80,7 @@
           <groupId>net.alchim31.maven</groupId>
           <artifactId>scala-maven-plugin</artifactId>
           <configuration>
-            <javacArgs>
+            <javacArgs combine.children="append">
               <!-- This option is needed to suppress warnings from sun.misc.Unsafe usage -->
               <javacArg>-XDignore.symbol.file</javacArg>
             </javacArgs>