diff --git a/Include/internal/pygetopt.h b/Include/internal/pygetopt.h
new file mode 100644
index 00000000000..df6f18354ee
--- /dev/null
+++ b/Include/internal/pygetopt.h
@@ -0,0 +1,19 @@
+#ifndef Py_INTERNAL_PYGETOPT_H
+#define Py_INTERNAL_PYGETOPT_H
+
+int _PyOS_opterr;
+int _PyOS_optind;
+wchar_t *_PyOS_optarg;
+
+void _PyOS_ResetGetOpt(void);
+
+typedef struct {
+    const wchar_t *name;
+    int has_arg;
+    int val;
+} _PyOS_LongOption;
+
+int _PyOS_GetOpt(int argc, wchar_t **argv, wchar_t *optstring,
+                 const _PyOS_LongOption *longopts, int *longindex);
+
+#endif /* !Py_INTERNAL_PYGETOPT_H */
diff --git a/Include/pygetopt.h b/Include/pygetopt.h
deleted file mode 100644
index 3e3fe364901..00000000000
--- a/Include/pygetopt.h
+++ /dev/null
@@ -1,28 +0,0 @@
-
-#ifndef Py_PYGETOPT_H
-#define Py_PYGETOPT_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef Py_LIMITED_API
-PyAPI_DATA(int) _PyOS_opterr;
-PyAPI_DATA(int) _PyOS_optind;
-PyAPI_DATA(wchar_t *) _PyOS_optarg;
-
-PyAPI_FUNC(void) _PyOS_ResetGetOpt(void);
-
-typedef struct {
-    const wchar_t *name;
-    int has_arg;
-    int val;
-} _PyOS_LongOption;
-
-PyAPI_FUNC(int) _PyOS_GetOpt(int argc, wchar_t **argv, wchar_t *optstring,
-                             const _PyOS_LongOption *longopts, int *longindex);
-#endif /* !Py_LIMITED_API */
-
-#ifdef __cplusplus
-}
-#endif
-#endif /* !Py_PYGETOPT_H */
diff --git a/Makefile.pre.in b/Makefile.pre.in
index fcce62f2577..4fe9affe0d2 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -987,7 +987,6 @@ PYTHON_HEADERS= \
 		$(srcdir)/Include/pyhash.h \
 		$(srcdir)/Include/pylifecycle.h \
 		$(srcdir)/Include/pymath.h \
-		$(srcdir)/Include/pygetopt.h \
 		$(srcdir)/Include/pymacro.h \
 		$(srcdir)/Include/pymem.h \
 		$(srcdir)/Include/pyport.h \
@@ -1017,6 +1016,7 @@ PYTHON_HEADERS= \
 		$(srcdir)/Include/internal/ceval.h \
 		$(srcdir)/Include/internal/gil.h \
 		$(srcdir)/Include/internal/mem.h \
+		$(srcdir)/Include/internal/pygetopt.h \
 		$(srcdir)/Include/internal/pystate.h \
 		$(srcdir)/Include/internal/warnings.h \
 		$(DTRACE_HEADERS)
diff --git a/Misc/NEWS.d/next/C API/2017-12-12-23-09-46.bpo-32264.ahRlOI.rst b/Misc/NEWS.d/next/C API/2017-12-12-23-09-46.bpo-32264.ahRlOI.rst
new file mode 100644
index 00000000000..5033d61a676
--- /dev/null
+++ b/Misc/NEWS.d/next/C API/2017-12-12-23-09-46.bpo-32264.ahRlOI.rst	
@@ -0,0 +1 @@
+Moved the pygetopt.h header into internal/, since it has no public APIs.
diff --git a/Modules/main.c b/Modules/main.c
index 339a0f5e681..6b602cf9b77 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -3,6 +3,7 @@
 #include "Python.h"
 #include "osdefs.h"
 #include "internal/import.h"
+#include "internal/pygetopt.h"
 #include "internal/pystate.h"
 
 #include <locale.h>
@@ -27,8 +28,6 @@
 #define PYTHONHOMEHELP "<prefix>/lib/pythonX.X"
 #endif
 
-#include "pygetopt.h"
-
 #define COPYRIGHT \
     "Type \"help\", \"copyright\", \"credits\" or \"license\" " \
     "for more information."
diff --git a/PCbuild/pythoncore.vcxproj b/PCbuild/pythoncore.vcxproj
index 1dca3ccca1d..25651d00049 100644
--- a/PCbuild/pythoncore.vcxproj
+++ b/PCbuild/pythoncore.vcxproj
@@ -150,7 +150,7 @@
     <ClInclude Include="..\Include\pyerrors.h" />
     <ClInclude Include="..\Include\pyexpat.h" />
     <ClInclude Include="..\Include\pyfpe.h" />
-    <ClInclude Include="..\Include\pygetopt.h" />
+    <ClInclude Include="..\Include\internal\pygetopt.h" />
     <ClInclude Include="..\Include\pylifecycle.h" />
     <ClInclude Include="..\Include\pymath.h" />
     <ClInclude Include="..\Include\pytime.h" />
diff --git a/PCbuild/pythoncore.vcxproj.filters b/PCbuild/pythoncore.vcxproj.filters
index 969ba0850b2..42b2fc3ea7c 100644
--- a/PCbuild/pythoncore.vcxproj.filters
+++ b/PCbuild/pythoncore.vcxproj.filters
@@ -234,7 +234,7 @@
     <ClInclude Include="..\Include\pyfpe.h">
       <Filter>Include</Filter>
     </ClInclude>
-    <ClInclude Include="..\Include\pygetopt.h">
+    <ClInclude Include="..\Include\internal\pygetopt.h">
       <Filter>Include</Filter>
     </ClInclude>
     <ClInclude Include="..\Include\pylifecycle.h">
diff --git a/Python/getopt.c b/Python/getopt.c
index de32ad4d8cb..e8d7e523c2e 100644
--- a/Python/getopt.c
+++ b/Python/getopt.c
@@ -31,7 +31,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <wchar.h>
-#include <pygetopt.h>
+#include "internal/pygetopt.h"
 
 #ifdef __cplusplus
 extern "C" {