diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index db141589fcb..587f1ae1424 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2020-09-17  Pedro Alves  <pedro@palves.net>
+
+	* gdb.python/py-as-string.c: Add cast.
+
 2020-09-17  Pedro Alves  <pedro@palves.net>
 
 	* gdb.base/sizeof.c (fill): Add cast.
diff --git a/gdb/testsuite/gdb.python/py-as-string.c b/gdb/testsuite/gdb.python/py-as-string.c
index 7780a9c93c2..245bcb286bd 100644
--- a/gdb/testsuite/gdb.python/py-as-string.c
+++ b/gdb/testsuite/gdb.python/py-as-string.c
@@ -23,7 +23,7 @@ enum EnumType {
 };
 
 static enum EnumType enum_valid = ENUM_VALUE_B;
-static enum EnumType enum_invalid = 20;
+static enum EnumType enum_invalid = (enum EnumType) 20;
 
 int
 main ()