diff --git a/lib.mk b/lib.mk
index f390a7e8a..ba1fb3a2a 100644
--- a/lib.mk
+++ b/lib.mk
@@ -62,15 +62,6 @@ ifeq ($(BUILD_SHARED_LIBS), 1)
   SET_RPATH_TO_LIBS ?= 1
 endif
 
-
-# On MacOS X, some boost libraries have an -mt suffix
-ifeq ($(OS), Darwin)
-  ifndef NIX_STORE
-    BOOST_SUFFIX = -mt
-  endif
-endif
-
-
 # Pass -g if we want debug info.
 BUILD_DEBUG ?= 1