diff --git a/jdk/make/com/sun/crypto/provider/Makefile b/jdk/make/com/sun/crypto/provider/Makefile
index f8134de149b..5dccb9f81b3 100644
--- a/jdk/make/com/sun/crypto/provider/Makefile
+++ b/jdk/make/com/sun/crypto/provider/Makefile
@@ -267,6 +267,7 @@ $(OBFUS_DIR)/sunjce.dox: $(CLOSED_DIR)/obfus/sunjce.dox
 # supports up to v49 class file format.  Force v49 classfiles in our
 # builds for now.
 #
+SOURCE_LANGUAGE_VERSION = 5
 TARGET_CLASS_VERSION = 5
 
 
diff --git a/jdk/make/javax/crypto/Makefile b/jdk/make/javax/crypto/Makefile
index 216ff6e222d..815a530ce27 100644
--- a/jdk/make/javax/crypto/Makefile
+++ b/jdk/make/javax/crypto/Makefile
@@ -416,6 +416,7 @@ $(OBFUS_DIR)/framework.dox: $(CLOSED_DIR)/obfus/framework.dox
 # supports up to v49 class file format.  Force v49 classfiles in our
 # builds for now.
 #
+SOURCE_LANGUAGE_VERSION = 5
 TARGET_CLASS_VERSION = 5