diff --git a/boost-base.jam b/boost-base.jam
index e4c27377f..dd9a23804 100644
--- a/boost-base.jam
+++ b/boost-base.jam
@@ -1309,13 +1309,8 @@ rule depend-on-libraries
     NEEDLIBS on $(<) += $(>) ;
     DEPENDS $(<) : $(>) ;
     # To run these targets, we need everything needed to run the libraries
-    for local dir in $(gRUN_PATH($(>)))
-    {
-        if ! ( $(dir) in $(gRUN_PATH($(<))) )
-        {
-            gRUN_PATH($(<)) += $(dir) ;
-        }
-    }
+    gRUN_PATH($(<)) = [ unique $(gRUN_PATH($(<))) $(gRUN_PATH($(>))) ] ;
+    gRUN_LD_LIBRARY_PATH($(<)) = [ unique $(gRUN_LD_LIBRARY_PATH($(<))) $(gRUN_LD_LIBRARY_PATH($(>))) ] ;
 }
 
 # subvariant-target target : subvariant-id build-properties : toolset variant
diff --git a/v1/boost-base.jam b/v1/boost-base.jam
index e4c27377f..dd9a23804 100644
--- a/v1/boost-base.jam
+++ b/v1/boost-base.jam
@@ -1309,13 +1309,8 @@ rule depend-on-libraries
     NEEDLIBS on $(<) += $(>) ;
     DEPENDS $(<) : $(>) ;
     # To run these targets, we need everything needed to run the libraries
-    for local dir in $(gRUN_PATH($(>)))
-    {
-        if ! ( $(dir) in $(gRUN_PATH($(<))) )
-        {
-            gRUN_PATH($(<)) += $(dir) ;
-        }
-    }
+    gRUN_PATH($(<)) = [ unique $(gRUN_PATH($(<))) $(gRUN_PATH($(>))) ] ;
+    gRUN_LD_LIBRARY_PATH($(<)) = [ unique $(gRUN_LD_LIBRARY_PATH($(<))) $(gRUN_LD_LIBRARY_PATH($(>))) ] ;
 }
 
 # subvariant-target target : subvariant-id build-properties : toolset variant