diff --git a/package/ibrdtn-tools/ibrdtn-tools.mk b/package/ibrdtn-tools/ibrdtn-tools.mk
index 97ec3c9e17..77dbfc1032 100644
--- a/package/ibrdtn-tools/ibrdtn-tools.mk
+++ b/package/ibrdtn-tools/ibrdtn-tools.mk
@@ -9,6 +9,7 @@ IBRDTN_TOOLS_SITE = https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/releases
 IBRDTN_TOOLS_LICENSE = Apache-2.0
 IBRDTN_TOOLS_LICENSE_FILES = COPYING
 IBRDTN_TOOLS_DEPENDENCIES = ibrcommon ibrdtn host-pkgconf
+IBRDTN_TOOLS_CONF_ENV = CXXFLAGS="$(TARGET_CXXFLAGS) -std=c++11"
 
 ifeq ($(BR2_STATIC_LIBS),y)
 IBRDTN_TOOLS_CONF_ENV += LDFLAGS="$(TARGET_LDFLAGS) -pthread"