diff --git a/core/artifact_path_requirements.mk b/core/artifact_path_requirements.mk
index ceaefa2..566b9f7 100644
--- a/core/artifact_path_requirements.mk
+++ b/core/artifact_path_requirements.mk
@@ -22,6 +22,10 @@
     $(TARGET_OUT_SYSTEM_OTHER)/%.art
 endif
 
+ifneq (,$(filter-out true false relaxed strict,$(PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS))$(filter-out 1 0,$(words $(PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS))))
+  $(error PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS must be one of [true, false, relaxed, strict], found: $(PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS))
+endif
+
 all_offending_files :=
 $(foreach makefile,$(ARTIFACT_PATH_REQUIREMENT_PRODUCTS),\
   $(eval requirements := $(PRODUCTS.$(makefile).ARTIFACT_PATH_REQUIREMENTS)) \
@@ -46,7 +50,7 @@
   $(eval allowed_patterns := $(call resolve-product-relative-paths,$(allowed))) \
   $(eval offending_files := $(filter-out $(allowed_patterns),$(files_in_requirement))) \
   $(eval enforcement := $(PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS)) \
-  $(if $(enforcement),\
+  $(if $(filter-out false,$(enforcement)),\
     $(call maybe-print-list-and-error,$(offending_files),\
       $(INTERNAL_PRODUCT) produces files inside $(makefile)s artifact path requirement. \
       $(PRODUCT_ARTIFACT_PATH_REQUIREMENT_HINT)) \