diff --git a/contrib/pg_buffercache/pg_buffercache_pages.c b/contrib/pg_buffercache/pg_buffercache_pages.c
index 1bd579fcbb0..d58a8991f38 100644
--- a/contrib/pg_buffercache/pg_buffercache_pages.c
+++ b/contrib/pg_buffercache/pg_buffercache_pages.c
@@ -148,6 +148,8 @@ pg_buffercache_pages(PG_FUNCTION_ARGS)
 			BufferDesc *bufHdr;
 			uint32		buf_state;
 
+			CHECK_FOR_INTERRUPTS();
+
 			bufHdr = GetBufferDescriptor(i);
 			/* Lock each buffer header before inspecting. */
 			buf_state = LockBufHdr(bufHdr);