diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index 95ac15c..6d3a6d8 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -8,6 +8,8 @@
 #endif
 
 #define PyCF_MASK (CO_GENERATOR_ALLOWED | CO_FUTURE_DIVISION)
+#define PyCF_MASK_OBSOLETE (CO_NESTED)
+
 typedef struct {
 	int cf_flags;  /* bitmask of CO_xxx flags relevant to future */
 } PyCompilerFlags;
diff --git a/Python/ceval.c b/Python/ceval.c
index 6ee8ae3..d3898fb 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2928,13 +2928,10 @@
 
 	if (current_frame != NULL) {
 		const int codeflags = current_frame->f_code->co_flags;
-		if (codeflags & CO_NESTED) {
+		const int compilerflags = codeflags & PyCF_MASK;
+		if (compilerflags) {
 			result = 1;
-			cf->cf_flags |= CO_NESTED;
-		}
-		if (codeflags & CO_GENERATOR_ALLOWED) {
-			result = 1;
-			cf->cf_flags |= CO_GENERATOR_ALLOWED;
+			cf->cf_flags |= compilerflags;
 		}
 	}
 	return result;