diff --git a/tools/llvm-config/Makefile b/tools/llvm-config/Makefile
index d777e81..f07bcc9 100644
--- a/tools/llvm-config/Makefile
+++ b/tools/llvm-config/Makefile
@@ -53,6 +53,7 @@
 	$(Echo) "Building llvm-config script."
 	$(Verb) $(ECHO) 's,@LLVM_CXXFLAGS@,$(SUB_CXXFLAGS),' > temp.sed
 	$(Verb) $(ECHO) 's,@LLVM_LDFLAGS@,$(SUB_LDFLAGS),' >> temp.sed
+	$(Verb) $(ECHO) 's,@LLVM_BUILDMODE@,$(BuildMode),' >> temp.sed
 	$(Verb) $(SED) -f temp.sed < $< > $@
 	$(Verb) $(RM) temp.sed
 	$(Verb) cat $(FinalLibDeps) >> $@
diff --git a/tools/llvm-config/llvm-config.in.in b/tools/llvm-config/llvm-config.in.in
index 5029541..e33aed3 100644
--- a/tools/llvm-config/llvm-config.in.in
+++ b/tools/llvm-config/llvm-config.in.in
@@ -47,6 +47,7 @@
 #---- begin Makefile values ----
 my $CXXFLAGS            = q{@LLVM_CXXFLAGS@};
 my $LDFLAGS             = q{@LLVM_LDFLAGS@};
+my $LLVM_BUILDMODE      = q{@LLVM_BUILDMODE@};
 #---- end Makefile values ----
 
 # Convert the current executable name into its directory (e.g. ".").