diff --git a/package/bctoolbox/Config.in b/package/bctoolbox/Config.in
index 834f6e2a6a..e9e69205f8 100644
--- a/package/bctoolbox/Config.in
+++ b/package/bctoolbox/Config.in
@@ -2,11 +2,13 @@ config BR2_PACKAGE_BCTOOLBOX
 	bool "bctoolbox"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS
-	select BR2_PACKAGE_MBEDTLS # mbedtls is preferred over polarssl
 	help
 	  Utilities library used by Belledonne Communications
 	  softwares like belle-sip, mediastreamer2 and linphone.
 
+	  Select BR2_PACKAGE_MBEDTLS (preferred) or
+	  BR2_PACKAGE_POLARSSL for crypto support.
+
 	  https://github.com/BelledonneCommunications/bctoolbox
 
 comment "bctoolbox needs a toolchain w/ C++, threads"
diff --git a/package/bctoolbox/bctoolbox.mk b/package/bctoolbox/bctoolbox.mk
index 64c67792a7..5eea0575fc 100644
--- a/package/bctoolbox/bctoolbox.mk
+++ b/package/bctoolbox/bctoolbox.mk
@@ -17,6 +17,22 @@ BCTOOLBOX_CONF_OPTS = \
 	-DENABLE_TESTS=OFF \
 	-DGIT_EXECUTABLE=OFF
 
+# bctoolbox can be build with mbedTLS or PolarSSL support. If both
+# libraries are present, mbedTLS is preferred over PolarSSL.
+ifeq ($(BR2_PACKAGE_MBEDTLS),y)
+BCTOOLBOX_DEPENDENCIES += mbedtls
+BCTOOLBOX_CONF_OPTS += -DENABLE_MBEDTLS=ON
+else
+BCTOOLBOX_CONF_OPTS += -DENABLE_MBEDTLS=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_POLARSSL),y)
+BCTOOLBOX_DEPENDENCIES += polarssl
+BCTOOLBOX_CONF_OPTS += -DENABLE_POLARSSL=ON
+else
+BCTOOLBOX_CONF_OPTS += -DENABLE_POLARSSL=OFF
+endif
+
 ifeq ($(BR2_STATIC_LIBS),y)
 BCTOOLBOX_CONF_OPTS += -DENABLE_SHARED=OFF -DENABLE_STATIC=ON
 else ifeq ($(BR2_SHARED_STATIC_LIBS),y)