diff --git a/src/main/native/opus/Makefile.windows10.amd64 b/src/main/native/opus/Makefile.windows10.amd64
new file mode 100644
index 0000000..4022f87
--- /dev/null
+++ b/src/main/native/opus/Makefile.windows10.amd64
@@ -0,0 +1,28 @@
+# -*-makefile-*-
+
+CC=gcc
+JAVA = java-8-openjdk-amd64
+NATIVE = ../../resources/native/WINDOW~1/amd64/
+INCLUDES = -IC:/PROGRA~1/Java/jdk1.8.0_144/include\
+	   -IC:/PROGRA~1/Java/jdk1.8.0_144/include/win32\
+	   -I/usr/local/include
+CFLAGS = -Ofast -Wall -fPIC $(INCLUDES)
+LDFLAGS = -Wl,-soname,libjni_opus.dll,-rpath='$$ORIGIN' -shared
+LDPATH = -L$(NATIVE)
+LIBS = -lopus -lspeex -lspeexdsp
+SOURCES = za_co_monadic_scopus_opus_Opus__.c za_co_monadic_scopus_speex_Speex__.c
+TARGETLIB = libjni_opus.dll
+
+all: libjni_opus.dll
+
+clean:
+	rm -f *.o *~ $(TARGETLIB)
+
+$(TARGETLIB) : $(SOURCES:.c=.o)
+	$(CC) $(LDFLAGS) $(LDPATH) -o $@ $^ $(LIBS)
+
+install: $(TARGETLIB)
+	cp $(TARGETLIB) $(NATIVE)
+
+.c.o:
+	$(CC) -c  $(CFLAGS) $< -o $@
diff --git a/src/main/native/opus/za_co_monadic_scopus_opus_Opus__.c b/src/main/native/opus/za_co_monadic_scopus_opus_Opus__.c
index 04517e5..fd7150a 100644
--- a/src/main/native/opus/za_co_monadic_scopus_opus_Opus__.c
+++ b/src/main/native/opus/za_co_monadic_scopus_opus_Opus__.c
@@ -189,8 +189,8 @@ JNIEXPORT jint JNICALL Java_za_co_monadic_scopus_opus_Opus_00024_encoder_1set_1c
 }
 
 JNIEXPORT jstring JNICALL Java_za_co_monadic_scopus_opus_Opus_00024_error_1string
-    (JNIEnv *env, jobject clazz, jint errno) {
-    const char *err_str = opus_strerror(errno);
+    (JNIEnv *env, jobject clazz, jint errorno) {
+    const char *err_str = opus_strerror(errorno);
     return (*env)->NewStringUTF(env, err_str);
 }
 
diff --git a/src/main/resources/native/Windows 10/amd64/libjni_opus.dll b/src/main/resources/native/Windows 10/amd64/libjni_opus.dll
new file mode 100644
index 0000000..01fca4b
Binary files /dev/null and b/src/main/resources/native/Windows 10/amd64/libjni_opus.dll differ
diff --git a/src/main/resources/native/Windows 10/amd64/libopus-0.dll b/src/main/resources/native/Windows 10/amd64/libopus-0.dll
new file mode 100644
index 0000000..0a296d0
Binary files /dev/null and b/src/main/resources/native/Windows 10/amd64/libopus-0.dll differ
diff --git a/src/main/resources/native/Windows 10/amd64/libspeex-1.dll b/src/main/resources/native/Windows 10/amd64/libspeex-1.dll
new file mode 100644
index 0000000..f085f9b
Binary files /dev/null and b/src/main/resources/native/Windows 10/amd64/libspeex-1.dll differ
diff --git a/src/main/resources/native/Windows 10/amd64/libspeexdsp-1.dll b/src/main/resources/native/Windows 10/amd64/libspeexdsp-1.dll
new file mode 100644
index 0000000..3a47a6e
Binary files /dev/null and b/src/main/resources/native/Windows 10/amd64/libspeexdsp-1.dll differ
diff --git a/src/main/scala/za/co/monadic/scopus/Libraries.scala b/src/main/scala/za/co/monadic/scopus/Libraries.scala
index 794a237..a385b96 100644
--- a/src/main/scala/za/co/monadic/scopus/Libraries.scala
+++ b/src/main/scala/za/co/monadic/scopus/Libraries.scala
@@ -35,6 +35,11 @@ object Libraries {
       LibLoader("libspeex.1.dylib", load = false)
       LibLoader("libspeexdsp.1.dylib", load = false)
       LibLoader("libjni_opus.dylib")
+    case "Windows 10/amd64" =>
+      LibLoader("libopus-0.dll")
+      LibLoader("libspeex-1.dll")
+      LibLoader("libspeexdsp-1.dll")
+      LibLoader("libjni_opus.dll")
     case s: String =>
       println(s"Unknown OS/platform combination: $s")
       sys.exit(-1)