diff --git a/Android.mk b/Android.mk
index 074ceb22..9585d50a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -129,7 +129,8 @@ SPVTOOLS_OPT_SRC_FILES := \
 SPV_CORE10_GRAMMAR=$(SPVHEADERS_LOCAL_PATH)/include/spirv/1.0/spirv.core.grammar.json
 SPV_CORE11_GRAMMAR=$(SPVHEADERS_LOCAL_PATH)/include/spirv/1.1/spirv.core.grammar.json
 SPV_CORE12_GRAMMAR=$(SPVHEADERS_LOCAL_PATH)/include/spirv/1.2/spirv.core.grammar.json
-SPV_CORELATEST_GRAMMAR=$(SPV_CORE12_GRAMMAR)
+SPV_COREUNIFIED1_GRAMMAR=$(SPVHEADERS_LOCAL_PATH)/include/spirv/unified1/spirv.core.grammar.json
+SPV_CORELATEST_GRAMMAR=$(SPV_COREUNIFIED1_GRAMMAR)
 SPV_GLSL_GRAMMAR=$(SPVHEADERS_LOCAL_PATH)/include/spirv/1.2/extinst.glsl.std.450.grammar.json
 SPV_OPENCL_GRAMMAR=$(SPVHEADERS_LOCAL_PATH)/include/spirv/1.2/extinst.opencl.std.100.grammar.json
 # TODO(dneto): I expect the DebugInfo grammar file to eventually migrate to SPIRV-Headers