diff --git a/src/backend/executor/spi.c b/src/backend/executor/spi.c
index f73c1e79e18..9d214f92d1c 100644
--- a/src/backend/executor/spi.c
+++ b/src/backend/executor/spi.c
@@ -2039,6 +2039,8 @@ SPI_result_code_string(int code)
 			return "SPI_OK_REL_REGISTER";
 		case SPI_OK_REL_UNREGISTER:
 			return "SPI_OK_REL_UNREGISTER";
+		case SPI_OK_TD_REGISTER:
+			return "SPI_OK_TD_REGISTER";
 	}
 	/* Unrecognized code ... return something useful ... */
 	sprintf(buf, "Unrecognized SPI code %d", code);