diff --git a/Makefile.in b/Makefile.in
index ebae13db1..5fcfeab53 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -670,12 +670,12 @@ STAGE2_CONFIGURE_FLAGS += --with-libphobos-druntime-only
 # stage2 and stage3 we are merely avoid doing redundant work, plus we apply
 # checking when building all target libraries for release builds.
 STAGE1_TFLAGS += -fno-checking
-STAGE2_CFLAGS += -fno-checking
-STAGE2_TFLAGS += -fno-checking
+STAGE2_CFLAGS += -fchecking=1
+STAGE2_TFLAGS += -fchecking=1
 STAGE3_CFLAGS += -fchecking=1
 STAGE3_TFLAGS += -fchecking=1
 @if target-libphobos-bootstrap
-STAGE2_GDCFLAGS += -fno-checking
+STAGE2_GDCFLAGS += -fchecking=1
 STAGE3_GDCFLAGS += -fchecking=1
 @endif target-libphobos-bootstrap