diff --git a/devel/rubygem-thread_safe1/Makefile b/devel/rubygem-thread_safe1/Makefile
index 327ca9bb5fb1..8d7d0e4bf167 100644
--- a/devel/rubygem-thread_safe1/Makefile
+++ b/devel/rubygem-thread_safe1/Makefile
@@ -18,4 +18,6 @@ USE_RUBY=	yes
 USE_RUBYGEMS=	yes
 RUBYGEM_AUTOPLIST=	yes
 
+PORTSCOUT=	limit:^0\.1
+
 .include <bsd.port.mk>