--- a/usr/portage/dev-ros/xmlrpcpp/xmlrpcpp-1.14.3.ebuild	
+++ a/usr/portage/dev-ros/xmlrpcpp/xmlrpcpp-1.14.3.ebuild	
@@ -14,5 +14,8 @@ LICENSE="BSD"
 SLOT="0"
 IUSE=""
 
-RDEPEND="dev-ros/cpp_common"
+RDEPEND="
+	dev-ros/cpp_common
+	dev-ros/rostime
+	"
 DEPEND="${RDEPEND}"