diff --git a/app/app.c b/app/app.c
index b5a26c598e..e7b63940c1 100644
--- a/app/app.c
+++ b/app/app.c
@@ -44,6 +44,7 @@
 #undef GIMP_DISABLE_DEPRECATED /* for compat enums */
 #include "libgimpbase/gimpbase.h"
 #define GIMP_DISABLE_DEPRECATED
+#include "libgimpbase/gimpbase-private.h"
 #include "libgimpconfig/gimpconfig.h"
 
 #include "core/core-types.h"
diff --git a/libgimpbase/gimpbase-private.h b/libgimpbase/gimpbase-private.h
index 4b83b3f1d3..208069f970 100644
--- a/libgimpbase/gimpbase-private.h
+++ b/libgimpbase/gimpbase-private.h
@@ -23,6 +23,7 @@
 #define __GIMP_BASE_PRIVATE_H__
 
 
+#include <libgimpbase/gimpcpuaccel-private.h>
 #include <libgimpbase/gimpenv-private.h>
 
 
diff --git a/libgimpbase/gimpcpuaccel-private.h b/libgimpbase/gimpcpuaccel-private.h
new file mode 100644
index 0000000000..df46b7a4c6
--- /dev/null
+++ b/libgimpbase/gimpcpuaccel-private.h
@@ -0,0 +1,32 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpcpuaccel-private.h
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_CPU_ACCEL_PRIVATE_H__
+#define __GIMP_CPU_ACCEL_PRIVATE_H__
+
+G_BEGIN_DECLS
+
+
+void gimp_cpu_accel_set_use (gboolean use);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_CPU_ACCEL_PRIVATE_H__ */
diff --git a/libgimpbase/gimpcpuaccel.c b/libgimpbase/gimpcpuaccel.c
index 2c864dc886..1d8f706f37 100644
--- a/libgimpbase/gimpcpuaccel.c
+++ b/libgimpbase/gimpcpuaccel.c
@@ -36,6 +36,7 @@
 #include <glib.h>
 
 #include "gimpcpuaccel.h"
+#include "gimpcpuaccel-private.h"
 
 
 /**
diff --git a/libgimpbase/gimpcpuaccel.h b/libgimpbase/gimpcpuaccel.h
index 03c0d4b6b7..73495bd317 100644
--- a/libgimpbase/gimpcpuaccel.h
+++ b/libgimpbase/gimpcpuaccel.h
@@ -67,10 +67,6 @@ typedef enum
 GimpCpuAccelFlags  gimp_cpu_accel_get_support (void);
 
 
-/* for internal use only */
-void               gimp_cpu_accel_set_use     (gboolean use);
-
-
 G_END_DECLS
 
 #endif  /* __GIMP_CPU_ACCEL_H__ */