diff --git a/extmod/ulab b/extmod/ulab
index b64fa6d4c7..eb33480797 160000
--- a/extmod/ulab
+++ b/extmod/ulab
@@ -1 +1 @@
-Subproject commit b64fa6d4c73287edef9ccf09cfd6ec5009f9628b
+Subproject commit eb33480797dab382352f3c37668d5dbf1a54505d
diff --git a/py/py.mk b/py/py.mk
index 3f94aa67a0..e064b325e5 100644
--- a/py/py.mk
+++ b/py/py.mk
@@ -108,7 +108,8 @@ endif
 ifeq ($(CIRCUITPY_ULAB),1)
 SRC_MOD += $(patsubst $(TOP)/%,%,$(wildcard $(TOP)/extmod/ulab/code/*.c))
 SRC_MOD += $(patsubst $(TOP)/%,%,$(wildcard $(TOP)/extmod/ulab/code/*/*.c))
-CFLAGS_MOD += -DCIRCUITPY_ULAB=1 -DMODULE_ULAB_ENABLED=1
+SRC_MOD += $(patsubst $(TOP)/%,%,$(wildcard $(TOP)/extmod/ulab/code/*/*/*.c))
+CFLAGS_MOD += -DCIRCUITPY_ULAB=1 -DMODULE_ULAB_ENABLED=1 -iquote $(TOP)/extmod/ulab/code
 $(BUILD)/extmod/ulab/code/%.o: CFLAGS += -Wno-missing-declarations -Wno-missing-prototypes -Wno-unused-parameter -Wno-float-equal -Wno-sign-compare -Wno-cast-align -Wno-shadow -DCIRCUITPY
 endif