diff --git a/projects/Makefile b/projects/Makefile
index b966fc7..491d596 100644
--- a/projects/Makefile
+++ b/projects/Makefile
@@ -14,6 +14,9 @@
 # Before 2008.06.24 it lived in llvm-test, so exclude that as well for now.
 DIRS:= $(filter-out llvm-test test-suite,$(patsubst $(PROJ_SRC_DIR)/%/Makefile,%,$(wildcard $(PROJ_SRC_DIR)/*/Makefile)))
 
+# Don't build compiler-rt either, it isn't designed to be built directly.
+DIRS := $(filter-out compiler-rt,$(DIRS))
+
 # Sparc cannot link shared libraries (libtool problem?)
 ifeq ($(ARCH), Sparc)
 DIRS := $(filter-out sample, $(DIRS))