diff --git a/closed/custom/Main.gmk b/closed/custom/Main.gmk
index 93da04f8312..cd0e0d0623d 100644
--- a/closed/custom/Main.gmk
+++ b/closed/custom/Main.gmk
@@ -136,7 +136,7 @@ else ifeq ($(OPENJDK_TARGET_OS), linux)
   endif
 else ifeq ($(OPENJDK_TARGET_OS), windows)
   ifeq ($(OPENJDK_TARGET_CPU), x86_64)
-    OPENSSL_TARGET := WIN64
+    JGSKIT_TARGET := win64
     JGSKIT_MAKE := jgskit.win64.mak
   endif
 endif # OPENJDK_TARGET_OS