diff --git a/src/tools/gcc.jam b/src/tools/gcc.jam
index b9bb9cf2a..b68c18aa2 100644
--- a/src/tools/gcc.jam
+++ b/src/tools/gcc.jam
@@ -457,12 +457,13 @@ local rule compile-link-flags ( * )
     threading-flags <target-os>windows : -mthreads ;
     threading-flags <target-os>cygwin  : -mthreads ;
     threading-flags <target-os>solaris  : -pthreads : rt ;
+    threading-flags <target-os>qnx : -pthread ;
 
     local bsd = [ MATCH ^(.*bsd)$ : $(all-os) ] ;
     threading-flags <target-os>$(bsd) : -pthread ;
 
     local no-threading = android beos haiku sgi darwin vxworks ;
-    local threading-generic-os = [ set.difference $(all-os) : $(no-threading) $(bsd) windows cygwin solaris ] ;
+    local threading-generic-os = [ set.difference $(all-os) : $(no-threading) $(bsd) windows cygwin solaris qnx ] ;
     threading-flags <target-os>$(threading-generic-os) : -pthread : rt ;
 }