diff --git a/extensions/metrics/build/Makefile.in b/extensions/metrics/build/Makefile.in
index 7161e59e86a3..5fd8b3441cff 100644
--- a/extensions/metrics/build/Makefile.in
+++ b/extensions/metrics/build/Makefile.in
@@ -76,5 +76,8 @@ LOCAL_INCLUDES	= \
 
 include $(topsrcdir)/config/rules.mk
 
-LDFLAGS += -NODEFAULTLIB:MSVCRT
+ifeq ($(OS_ARCH),WINNT)
+  LDFLAGS += -NODEFAULTLIB:MSVCRT
+endif
+