diff --git a/gcc-tools.jam b/gcc-tools.jam
index bd0831a0b..7dc783bb3 100644
--- a/gcc-tools.jam
+++ b/gcc-tools.jam
@@ -48,6 +48,10 @@ else if $(UNIX)
         flags gcc FINDLIBS <threading>multi : rt ;
         NO_GNU_LN = true ; # sun seems not to use the GNU linker with gcc
         }
+    case BeOS :
+        {
+        # BeOS has no threading options, don't set anything here.
+        }
     case * :
         {
         flags gcc CFLAGS <threading>multi : -pthread ;
@@ -191,3 +195,4 @@ actions updated together piecemeal gcc-Archive-action
 
 
 
+
diff --git a/v1/gcc-tools.jam b/v1/gcc-tools.jam
index bd0831a0b..7dc783bb3 100644
--- a/v1/gcc-tools.jam
+++ b/v1/gcc-tools.jam
@@ -48,6 +48,10 @@ else if $(UNIX)
         flags gcc FINDLIBS <threading>multi : rt ;
         NO_GNU_LN = true ; # sun seems not to use the GNU linker with gcc
         }
+    case BeOS :
+        {
+        # BeOS has no threading options, don't set anything here.
+        }
     case * :
         {
         flags gcc CFLAGS <threading>multi : -pthread ;
@@ -191,3 +195,4 @@ actions updated together piecemeal gcc-Archive-action
 
 
 
+