diff --git a/dev-libs/boost/boost170-1.70.0.recipe b/dev-libs/boost/boost170-1.70.0.recipe
index d3c71d098..12da42374 100644
--- a/dev-libs/boost/boost170-1.70.0.recipe
+++ b/dev-libs/boost/boost170-1.70.0.recipe
@@ -6,7 +6,7 @@ expressions, and unit testing. It contains over eighty individual libraries."
 HOMEPAGE="https://www.boost.org/"
 SOURCE_URI="https://boostorg.jfrog.io/artifactory/main/release/$portVersion/source/boost_${portVersion//./_}.tar.bz2"
 CHECKSUM_SHA256="430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778"
-REVISION="7"
+REVISION="8"
 LICENSE="Boost v1.0"
 COPYRIGHT="1998-2018 Beman Dawes, David Abrahams, Rene Rivera, et al."
 SOURCE_DIR="boost_${portVersion//./_}"
@@ -104,10 +104,12 @@ PROVIDES_devel="
 	$devel_libs
 	devel:libboost_config$secondaryArchSuffix = $libVersion
 	"
-
 REQUIRES_devel="
 	boost170$secondaryArchSuffix == $portVersion base
 	"
+CONFLICTS_devel="
+	boost169${secondaryArchSuffix}_devel
+	"
 
 BUILD_REQUIRES="
 	haiku${secondaryArchSuffix}_devel >= r1~alpha4_pm_hrev51470