diff --git a/NEWS b/NEWS
index 199bebd93d4..3a3ed736d2c 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,9 @@ PHP                                                                        NEWS
 - OPCache:
   . Fixed issue #183 (TMP_VAR is not only used once). (Dmitry, Laruence)
 
+- PDO-ODBC:
+  . Fixed bug #50444 (PDO-ODBC changes for 64-bit).
+
 ?? ??? 2014, PHP 5.5.13
 
 - CLI server:
diff --git a/ext/pdo_odbc/odbc_stmt.c b/ext/pdo_odbc/odbc_stmt.c
index 8b0ccf34e6c..1d275cd6549 100644
--- a/ext/pdo_odbc/odbc_stmt.c
+++ b/ext/pdo_odbc/odbc_stmt.c
@@ -279,7 +279,7 @@ static int odbc_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *p
 	pdo_odbc_stmt *S = (pdo_odbc_stmt*)stmt->driver_data;
 	RETCODE rc;
 	SWORD sqltype = 0, ctype = 0, scale = 0, nullable = 0;
-	UDWORD precision = 0;
+	SQLULEN precision = 0;
 	pdo_odbc_param *P;
 	
 	/* we're only interested in parameters for prepared SQL right now */
@@ -551,7 +551,7 @@ static int odbc_stmt_describe(pdo_stmt_t *stmt, int colno TSRMLS_DC)
 	struct pdo_column_data *col = &stmt->columns[colno];
 	RETCODE rc;
 	SWORD	colnamelen;
-	SDWORD	colsize;
+	SQLULEN	colsize;
 	SQLLEN displaysize;
 
 	rc = SQLDescribeCol(S->stmt, colno+1, S->cols[colno].colname,
diff --git a/ext/pdo_odbc/php_pdo_odbc_int.h b/ext/pdo_odbc/php_pdo_odbc_int.h
index 87b2f9100dc..5e42951f865 100644
--- a/ext/pdo_odbc/php_pdo_odbc_int.h
+++ b/ext/pdo_odbc/php_pdo_odbc_int.h
@@ -157,7 +157,7 @@ typedef struct {
 } pdo_odbc_stmt;
 
 typedef struct {
-	SQLINTEGER len;
+	SQLLEN len;
 	SQLSMALLINT paramtype;
 	char *outbuf;
 	unsigned is_unicode:1;