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-rw-r--r--src/c_fl_gl_window.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/c_fl_gl_window.h b/src/c_fl_gl_window.h
index 4c48b59..6177db6 100644
--- a/src/c_fl_gl_window.h
+++ b/src/c_fl_gl_window.h
@@ -42,6 +42,7 @@ extern "C" char fl_gl_window_context_valid(GLWINDOW w);
extern "C" void fl_gl_window_set_context_valid(GLWINDOW w, char v);
extern "C" char fl_gl_window_valid(GLWINDOW w);
extern "C" void fl_gl_window_set_valid(GLWINDOW w, char v);
+extern "C" void fl_gl_window_invalidate(GLWINDOW w);
extern "C" void fl_gl_window_make_current(GLWINDOW w);
extern "C" void fl_gl_window_make_overlay_current(GLWINDOW w);