diff --git a/NEWS b/NEWS
index eea1ce0bf0f..d22eaf52224 100644
--- a/NEWS
+++ b/NEWS
@@ -34,6 +34,10 @@ PHP                                                                        NEWS
   . Fixed bug #80783 (PDO ODBC truncates BLOB records at every 256th byte).
     (cmb)
 
+- PDO_pgsql:
+  . Fixed bug #80892 (PDO::PARAM_INT is treated the same as PDO::PARAM_STR).
+    (Matteo)
+
 - Session:
   . Fixed bug #80889 (Cannot set save handler when save_handler is invalid).
     (cmb)
diff --git a/ext/pdo_pgsql/pgsql_statement.c b/ext/pdo_pgsql/pgsql_statement.c
index 21f4c83807e..a7b4bc1d8b3 100644
--- a/ext/pdo_pgsql/pgsql_statement.c
+++ b/ext/pdo_pgsql/pgsql_statement.c
@@ -52,6 +52,19 @@
 #define VARCHARLABEL "varchar"
 #define VARCHAROID   1043
 
+#define PG_INT32_MIN	(-0x7FFFFFFF-1)
+#define PG_INT32_MAX	(0x7FFFFFFF)
+
+#if defined(_MSC_VER)
+# define strtoll(s, f, b) _atoi64(s)
+#elif !defined(HAVE_STRTOLL)
+# if defined(HAVE_ATOLL)
+#  define strtoll(s, f, b) atoll(s)
+# else
+#  define strtoll(s, f, b) strtol(s, f, b)
+# endif
+#endif
+
 
 
 static int pgsql_stmt_dtor(pdo_stmt_t *stmt)
@@ -388,7 +401,16 @@ static int pgsql_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *
 						S->param_formats[param->paramno] = 0;
 					}
 
-					if (PDO_PARAM_TYPE(param->param_type) == PDO_PARAM_LOB) {
+					if (PDO_PARAM_TYPE(param->param_type) == PDO_PARAM_INT) {
+						/* we need to check if the number requires bigints */
+						long long val = strtoll(Z_STRVAL_P(parameter), NULL, 10);
+
+						if (val > PG_INT32_MAX || val < PG_INT32_MIN) {
+							S->param_types[param->paramno] = INT8OID;
+						} else {
+							S->param_types[param->paramno] = INT4OID;
+						}
+					} else if (PDO_PARAM_TYPE(param->param_type) == PDO_PARAM_LOB) {
 						S->param_types[param->paramno] = 0;
 						S->param_formats[param->paramno] = 1;
 					} else {
diff --git a/ext/pdo_pgsql/tests/bug_80892.phpt b/ext/pdo_pgsql/tests/bug_80892.phpt
new file mode 100644
index 00000000000..8c48b169560
--- /dev/null
+++ b/ext/pdo_pgsql/tests/bug_80892.phpt
@@ -0,0 +1,77 @@
+--TEST--
+Bug #80892 PDO::PARAM_INT is treated the same as PDO::PARAM_STR
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
+require __DIR__ . '/config.inc';
+require __DIR__ . '/../../../ext/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require __DIR__ . '/../../../ext/pdo/tests/pdo_test.inc';
+
+/** @var PDO $db */
+$db = PDOTest::test_factory(__DIR__ . '/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+
+$db->exec("CREATE OR REPLACE FUNCTION bug80892 (x bigint) RETURNS varchar AS $$ SELECT 'bigint' $$ LANGUAGE sql");
+$db->exec("CREATE OR REPLACE FUNCTION bug80892 (x int) RETURNS varchar AS $$ SELECT 'int' $$ LANGUAGE sql");
+$db->exec("CREATE OR REPLACE FUNCTION bug80892 (x text) RETURNS varchar AS $$ SELECT 'text' $$ LANGUAGE sql");
+
+// Sanity check
+var_dump($db->query("SELECT bug80892(2147483648)")->fetchColumn());
+var_dump($db->query("SELECT bug80892(1)")->fetchColumn());
+var_dump($db->query("SELECT bug80892('1')")->fetchColumn());
+
+// No binding
+$stmt = $db->prepare("SELECT bug80892(?)");
+$stmt->execute([1]);
+var_dump($stmt->fetchColumn());
+
+// Bind int value as string
+$stmt = $db->prepare("SELECT bug80892(?)");
+$stmt->bindValue(1, 1, PDO::PARAM_STR);
+$stmt->execute();
+var_dump($stmt->fetchColumn());
+
+// Bind int value as int
+$stmt = $db->prepare("SELECT bug80892(?)");
+$stmt->bindValue(1, 1, PDO::PARAM_INT);
+$stmt->execute();
+var_dump($stmt->fetchColumn());
+
+// Bind string value as int
+$stmt = $db->prepare("SELECT bug80892(?)");
+$stmt->bindValue(1, '1', PDO::PARAM_INT);
+$stmt->execute();
+var_dump($stmt->fetchColumn());
+
+// Bind bigint string value as int
+$stmt = $db->prepare("SELECT bug80892(?)");
+$stmt->bindValue(1, '2147483648', PDO::PARAM_INT);
+$stmt->execute();
+var_dump($stmt->fetchColumn());
+
+// Bind negative bigint (string on 32bit) as int
+$stmt = $db->prepare("SELECT bug80892(?)");
+$stmt->bindValue(1, PHP_INT_SIZE == 4 ? '-33333333333' : -33333333333, PDO::PARAM_INT);
+$stmt->execute();
+var_dump($stmt->fetchColumn());
+
+$db->exec("DROP FUNCTION bug80892 (bigint)");
+$db->exec("DROP FUNCTION bug80892 (int)");
+$db->exec("DROP FUNCTION bug80892 (text)");
+
+?>
+--EXPECT--
+string(6) "bigint"
+string(3) "int"
+string(4) "text"
+string(4) "text"
+string(4) "text"
+string(3) "int"
+string(3) "int"
+string(6) "bigint"
+string(6) "bigint"