diff --git a/core/config.mk b/core/config.mk
index 08147cf..53ee359 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -729,17 +729,13 @@
 
 COLUMN:= column
 
-ifeq ($(EXPERIMENTAL_USE_OPENJDK9),)
 USE_OPENJDK9 := true
-TARGET_OPENJDK9 :=
-else ifeq ($(EXPERIMENTAL_USE_OPENJDK9),false)
-USE_OPENJDK9 :=
+
+ifeq ($(EXPERIMENTAL_USE_OPENJDK9),)
 TARGET_OPENJDK9 :=
 else ifeq ($(EXPERIMENTAL_USE_OPENJDK9),1.8)
-USE_OPENJDK9 := true
 TARGET_OPENJDK9 :=
 else ifeq ($(EXPERIMENTAL_USE_OPENJDK9),true)
-USE_OPENJDK9 := true
 TARGET_OPENJDK9 := true
 endif
 
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index cd48316..deaee56 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -232,16 +232,11 @@
 ##
 ##
 
-ifdef USE_OPENJDK9
 # For OpenJDK 9 we use --patch-module to define the core libraries code.
 # TODO(tobiast): Reorganize this when adding proper support for OpenJDK 9
 # modules. Here we treat all code in core libraries as being in java.base
 # to work around the OpenJDK 9 module system. http://b/62049770
 $(full_target): PRIVATE_BOOTCLASSPATH_ARG := --patch-module=java.base=$(PRIVATE_BOOTCLASSPATH)
-else
-# For OpenJDK 8 we can use -bootclasspath to define the core libraries code.
-$(full_target): PRIVATE_BOOTCLASSPATH_ARG := $(addprefix -bootclasspath ,$(PRIVATE_BOOTCLASSPATH))
-endif
 $(full_target): $(full_src_files) $(LOCAL_GENERATED_SOURCES) $(full_java_libs) $(ZIPSYNC) $(LOCAL_SRCJARS) $(LOCAL_ADDITIONAL_DEPENDENCIES)
 	@echo Docs javadoc: $(PRIVATE_OUT_DIR)
 	@mkdir -p $(dir $@)