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-rw-r--r--src/include/access/gist_private.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/access/gist_private.h b/src/include/access/gist_private.h
index bfef2df4206..eb1c6728d4a 100644
--- a/src/include/access/gist_private.h
+++ b/src/include/access/gist_private.h
@@ -503,7 +503,7 @@ extern void gistSplitByKey(Relation r, Page page, IndexTuple *itup,
/* gistbuild.c */
extern IndexBuildResult *gistbuild(Relation heap, Relation index,
struct IndexInfo *indexInfo);
-extern void gistValidateBufferingOption(char *value);
+extern void gistValidateBufferingOption(const char *value);
/* gistbuildbuffers.c */
extern GISTBuildBuffers *gistInitBuildBuffers(int pagesPerBuffer, int levelStep,