diff --git a/NEWS b/NEWS
index 97841040e25..04e237e04ff 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,12 @@ 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)
+
+- PDO_ODBC:
+  . Fixed handling of single-key connection strings. (Calvin Buckley)
+
 - Standard:
   . Deprecated utf8_encode() and utf8_decode(). (Rowan Tommins)
 
diff --git a/ext/odbc/php_odbc.c b/ext/odbc/php_odbc.c
index 8833de77837..b6a66bb6e92 100644
--- a/ext/odbc/php_odbc.c
+++ b/ext/odbc/php_odbc.c
@@ -2173,7 +2173,8 @@ 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;
 			/* Force UID and PWD to be set in the DSN */
 			bool is_uid_set = uid && *uid
diff --git a/ext/pdo_odbc/odbc_driver.c b/ext/pdo_odbc/odbc_driver.c
index b9ece6d28f2..308cf7e10c9 100644
--- a/ext/pdo_odbc/odbc_driver.c
+++ b/ext/pdo_odbc/odbc_driver.c
@@ -480,7 +480,8 @@ 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;