diff --git a/src/p_armpe.h b/src/p_armpe.h
index 6712931a..fa79ff89 100644
--- a/src/p_armpe.h
+++ b/src/p_armpe.h
@@ -66,7 +66,7 @@ protected:
     virtual void buildLoader(const Filter *ft);
     virtual Linker* newLinker() const;
 
-    virtual const char *kernelDll() const { return "coredll.dll"; }
+    virtual const char *kernelDll() const { return "COREDLL.dll"; }
     virtual void processImports2(unsigned, unsigned);
     virtual void addStubImports();
 
diff --git a/src/pefile.h b/src/pefile.h
index 321f76f4..2092dd71 100644
--- a/src/pefile.h
+++ b/src/pefile.h
@@ -107,7 +107,7 @@ protected:
     upx_byte *oimpdlls;
     unsigned soimpdlls;
     ImportLinker *ilinker;
-    virtual const char *kernelDll() const { return "kernel32.dll"; }
+    virtual const char *kernelDll() const { return "KERNEL32.DLL"; }
     void addKernelImport(const char *);
     virtual void addStubImports();
     upx_uint64_t ilinkerGetAddress(const char *, const char *) const;