diff --git a/Makefile.pre.in b/Makefile.pre.in
index a6b5f212160..8c7a17be9e1 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1648,6 +1648,7 @@ PYTHON_HEADERS= \
 		$(srcdir)/Include/internal/pycore_fileutils.h \
 		$(srcdir)/Include/internal/pycore_floatobject.h \
 		$(srcdir)/Include/internal/pycore_format.h \
+		$(srcdir)/Include/internal/pycore_frame.h \
 		$(srcdir)/Include/internal/pycore_function.h \
 		$(srcdir)/Include/internal/pycore_genobject.h \
 		$(srcdir)/Include/internal/pycore_getopt.h \
diff --git a/PCbuild/pythoncore.vcxproj b/PCbuild/pythoncore.vcxproj
index 78f5234c634..d3bd5b378e0 100644
--- a/PCbuild/pythoncore.vcxproj
+++ b/PCbuild/pythoncore.vcxproj
@@ -218,6 +218,7 @@
     <ClInclude Include="..\Include\internal\pycore_fileutils.h" />
     <ClInclude Include="..\Include\internal\pycore_floatobject.h" />
     <ClInclude Include="..\Include\internal\pycore_format.h" />
+    <ClInclude Include="..\Include\internal\pycore_frame.h" />
     <ClInclude Include="..\Include\internal\pycore_function.h" />
     <ClInclude Include="..\Include\internal\pycore_gc.h" />
     <ClInclude Include="..\Include\internal\pycore_genobject.h" />