diff --git a/closed/custom/Main.gmk b/closed/custom/Main.gmk
index a098c2f7621..bda6818a9d3 100644
--- a/closed/custom/Main.gmk
+++ b/closed/custom/Main.gmk
@@ -122,21 +122,50 @@ endif # HEALTHCENTER_JAR
 
 ifeq (true,$(BUILD_JGSKIT))
 
+# Identify the desired JGSKIT target platform.
+JGSKIT_TARGET :=
+JGSKIT_MAKE := jgskit.mak
+JGSKIT_MAKE_PATH := $(OPENJCEPLUS_TOPDIR)/src/main/native/
+JCE_CLASSPATH := $(OPENJCEPLUS_TOPDIR)/src/main/java:$(TOPDIR)/src/java.base/share/classes
+JCE_CLASSPATH_WIN64 := "$(call MixedPath,$(OPENJCEPLUS_TOPDIR)/src/main/java)\;$(call MixedPath,$(TOPDIR)/src/java.base/share/classes)"
+
+ifeq ($(OPENJDK_TARGET_OS), aix)
+  JGSKIT_TARGET := ppc-aix64
+else ifeq ($(OPENJDK_TARGET_OS), linux)
+  ifeq ($(OPENJDK_TARGET_CPU), x86_64)
+    JGSKIT_TARGET := x86-linux64
+  else ifeq ($(OPENJDK_TARGET_CPU), ppc64le)
+    JGSKIT_TARGET := ppcle-linux64
+  endif
+else ifeq ($(OPENJDK_TARGET_OS), windows)
+  ifeq ($(OPENJDK_TARGET_CPU), x86_64)
+    JGSKIT_TARGET := win64
+    JGSKIT_MAKE := jgskit.win64.mak
+    JCE_CLASSPATH := $(JCE_CLASSPATH_WIN64)
+    GSKIT_HOME := $(call MixedPath,$(GSKIT_HOME))
+    BOOT_JDK := $(call MixedPath,$(BOOT_JDK))
+  endif
+endif # OPENJDK_TARGET_OS
+
+ifeq (,$(JGSKIT_TARGET))
+  $(error Unsupported platform $(OPENJDK_TARGET_OS)-$(OPENJDK_TARGET_CPU))
+endif # JGSKIT_TARGET
+
 .PHONY : clean-openjceplus openjceplus-libs
 
 clean : clean-openjceplus
 
 clean-openjceplus :
 	@$(ECHO) Cleaning OpenJCEPlus native
-	@$(RM) -f $(addprefix $(OPENJCEPLUS_TOPDIR)/src/main/native/, com_ibm_crypto_plus_provider_icc_NativeInterface.h com_ibm_crypto_plus_provider_icc_FastJNIBuffer.h libjgskit.x)
-	$(MAKE) -C $(OPENJCEPLUS_TOPDIR)/src/main/native/ -f jgskit.mak cleanAll
+	@$(RM) -f $(addprefix $(JGSKIT_MAKE_PATH), com_ibm_crypto_plus_provider_icc_NativeInterface.h com_ibm_crypto_plus_provider_icc_FastJNIBuffer.h libjgskit.x)
+	$(MAKE) -C $(JGSKIT_MAKE_PATH) -f $(JGSKIT_MAKE) cleanAll
 
 openjceplus-copy : openjceplus-libs
 
 openjceplus-libs :
 	@$(ECHO) Compiling OpenJCEPlus native
-	export PLATFORM=x86-linux64 JAVA_HOME=$(BOOT_JDK) GSKIT_HOME=$(GSKIT_HOME) JCE_CLASSPATH=$(OPENJCEPLUS_TOPDIR)/src/main/java/:$(TOPDIR)/src/java.base/share/classes/ \
-		&& $(MAKE) -j1 -C $(OPENJCEPLUS_TOPDIR)/src/main/native/ -f jgskit.mak all
+	export PLATFORM=$(JGSKIT_TARGET) JAVA_HOME=$(BOOT_JDK) GSKIT_HOME=$(GSKIT_HOME) JCE_CLASSPATH=$(JCE_CLASSPATH) \
+		&& $(MAKE) -j1 -C $(JGSKIT_MAKE_PATH) -f $(JGSKIT_MAKE) all
 	@$(ECHO) OpenJCEplus compile complete
 
 endif # BUILD_JGSKIT
diff --git a/closed/make/modules/openjceplus/Copy.gmk b/closed/make/modules/openjceplus/Copy.gmk
index db6361a87a9..f9561b2ad8a 100644
--- a/closed/make/modules/openjceplus/Copy.gmk
+++ b/closed/make/modules/openjceplus/Copy.gmk
@@ -24,7 +24,7 @@ ifeq (true,$(BUILD_JGSKIT))
   # Copy OpenJCEPlus native libraries
   $(eval $(call SetupCopyFiles, COPY_JGSKIT_LIBS, \
       SRC := $(OPENJCEPLUS_TOPDIR), \
-      FILES := $(filter %.so %.x,$(call FindFiles, $(OPENJCEPLUS_TOPDIR))), \
+      FILES := $(filter %.so %.dll,$(call FindFiles, $(OPENJCEPLUS_TOPDIR))), \
       FLATTEN := true, \
       DEST := $(LIB_DST_DIR), \
   ))