diff --git a/ext/pgsql/config.m4 b/ext/pgsql/config.m4
index b8952521c3020..48fbbae34ace0 100644
--- a/ext/pgsql/config.m4
+++ b/ext/pgsql/config.m4
@@ -28,11 +28,6 @@ if test "$PHP_PGSQL" != "no"; then
       [Define to 1 if libpq has the 'PQsocketPoll' function (PostgreSQL 17 or
       later).])],,
     [$PGSQL_LIBS])
-  PHP_CHECK_LIBRARY([pq], [PQsetChunkedRowsMode],
-    [AC_DEFINE([HAVE_PG_SET_CHUNKED_ROWS_SIZE], [1],
-      [Define to 1 if libpq has the 'PQsetChunkedRowsMode' function (PostgreSQL
-      17 or later).])],,
-    [$PGSQL_LIBS])
   PHP_CHECK_LIBRARY([pq], [PQclosePrepared],
     [AC_DEFINE([HAVE_PG_CLOSE_STMT], [1], [PostgreSQL 17 or later])],,
     [$PGSQL_LIBS])
@@ -40,6 +35,15 @@ if test "$PHP_PGSQL" != "no"; then
   old_CFLAGS=$CFLAGS
   CFLAGS="$CFLAGS $PGSQL_CFLAGS"
 
+  AC_CHECK_DECLS([PGRES_TUPLES_CHUNK],
+    PHP_CHECK_LIBRARY([pq], [PQsetChunkedRowsMode],
+      [AC_DEFINE([HAVE_PG_SET_CHUNKED_ROWS_SIZE], [1],
+        [Define to 1 if libpq has the 'PQsetChunkedRowsMode' function (PostgreSQL
+        17 or later).])],,
+      [$PGSQL_LIBS]),,
+      [#include <libpq-fe.h>]
+  )
+
   dnl Available since PostgreSQL 12.
   AC_CACHE_CHECK([if PGVerbosity enum has PQERRORS_SQLSTATE],
     [php_cv_enum_pgverbosity_pqerrors_sqlstate],