diff --git a/NEWS b/NEWS
index 231c1601cd5..8eb5196ff48 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,9 @@ PHP                                                                        NEWS
   . Backwards-compatible mappings for 0x5C/0x7E in Shift-JIS are restored,
     after they had been changed in 8.1.0. (Alex Dowad)
 
+- ODBC:
+  . Fixed handling of single-key connection strings. (Calvin Buckley)
+
 - OPcache:
   . Fixed bug GH-8591 (tracing JIT crash after private instance method change).
     (Arnaud, Dmitry, Oleg Stepanischev)
@@ -34,6 +37,9 @@ PHP                                                                        NEWS
   . Fixed bug #81713 (NULL byte injection in several OpenSSL functions working
     with certificates). (Jakub Zelenka)
 
+- PDO_ODBC:
+  . Fixed handling of single-key connection strings. (Calvin Buckley)
+
 09 Jun 2022, PHP 8.1.7
 
 - CLI:
diff --git a/ext/odbc/php_odbc.c b/ext/odbc/php_odbc.c
index a99785985ff..dd2bbd03e79 100644
--- a/ext/odbc/php_odbc.c
+++ b/ext/odbc/php_odbc.c
@@ -2167,7 +2167,8 @@ int odbc_sqlconnect(odbc_connection **conn, char *db, char *uid, char *pwd, int
 		char    *ldb = 0;
 		int		ldb_len = 0;
 
-		if (strstr((char*)db, ";")) {
+		/* a connection string may have = but not ; - i.e. "DSN=PHP" */
+		if (strstr((char*)db, "=")) {
 			direct = 1;
 			if (uid && !strstr ((char*)db, "uid") && !strstr((char*)db, "UID")) {
 				spprintf(&ldb, 0, "%s;UID=%s;PWD=%s", db, uid, pwd);
diff --git a/ext/pdo_odbc/odbc_driver.c b/ext/pdo_odbc/odbc_driver.c
index 4f59913937a..42a95c5707c 100644
--- a/ext/pdo_odbc/odbc_driver.c
+++ b/ext/pdo_odbc/odbc_driver.c
@@ -478,7 +478,8 @@ static int pdo_odbc_handle_factory(pdo_dbh_t *dbh, zval *driver_options) /* {{{
 		goto fail;
 	}
 
-	if (strchr(dbh->data_source, ';')) {
+	/* a connection string may have = but not ; - i.e. "DSN=PHP" */
+	if (strchr(dbh->data_source, '=')) {
 		SQLCHAR dsnbuf[1024];
 		SQLSMALLINT dsnbuflen;