diff --git a/libs/ibrcommon/Makefile b/libs/ibrcommon/Makefile
index 43e26252d..b1adfd39f 100644
--- a/libs/ibrcommon/Makefile
+++ b/libs/ibrcommon/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ibrcommon
 PKG_VERSION:=1.0.1
-PKG_RELEASE:=8
+PKG_RELEASE:=9
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.ibr.cs.tu-bs.de/projects/ibr-dtn/releases
@@ -32,6 +32,8 @@ endef
 CONFIGURE_ARGS += \
 	--with-openssl
 
+TARGET_CXXFLAGS += -std=c++11
+
 define Package/ibrcommon/description
  A library with common functions for C++.
 endef
diff --git a/libs/ibrdtn/Makefile b/libs/ibrdtn/Makefile
index d85b2573a..a318084ab 100644
--- a/libs/ibrdtn/Makefile
+++ b/libs/ibrdtn/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ibrdtn
 PKG_VERSION:=1.0.1
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.ibr.cs.tu-bs.de/projects/ibr-dtn/releases
@@ -37,6 +37,8 @@ CONFIGURE_ARGS += \
 	--with-compression \
 	--without-glib
 
+TARGET_CXXFLAGS +=-std=c++11
+
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)
 	$(CP) $(PKG_INSTALL_DIR)/* $(1)/
diff --git a/net/ibrdtn-tools/Makefile b/net/ibrdtn-tools/Makefile
index f717f277a..8286b9bb3 100644
--- a/net/ibrdtn-tools/Makefile
+++ b/net/ibrdtn-tools/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ibrdtn-tools
 PKG_VERSION:=1.0.1
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.ibr.cs.tu-bs.de/projects/ibr-dtn/releases
@@ -36,6 +36,8 @@ endef
 CONFIGURE_ARGS += \
 	--without-libdaemon
 
+TARGET_CXXFLAGS += -std=c++11
+
 define Package/ibrdtn-tools/install
 	$(INSTALL_DIR) $(1)/usr/bin/
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/dtnping $(1)/usr/bin/dtnping
diff --git a/net/ibrdtnd/Makefile b/net/ibrdtnd/Makefile
index c23bc325c..f3e4bb5d0 100644
--- a/net/ibrdtnd/Makefile
+++ b/net/ibrdtnd/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ibrdtnd
 PKG_VERSION:=1.0.1
-PKG_RELEASE:=6
+PKG_RELEASE:=7
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.ibr.cs.tu-bs.de/projects/ibr-dtn/releases
@@ -46,6 +46,8 @@ CONFIGURE_ARGS += \
 	--without-vmime \
 	--disable-libdaemon
 
+TARGET_CXXFLAGS += -std=c++11
+
 define Package/ibrdtnd/install
 	$(INSTALL_DIR) $(1)/usr/sbin/
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/dtnd $(1)/usr/sbin/