diff --git a/cur/SQLExecDirect.c b/cur/SQLExecDirect.c
index 670694f..2055636 100644
--- a/cur/SQLExecDirect.c
+++ b/cur/SQLExecDirect.c
@@ -207,15 +207,23 @@ SQLRETURN get_column_names( CLHSTMT cl_statement )
 
     cl_statement -> column_names = malloc( sizeof(char *) 
             * cl_statement -> column_count );
+    if ( !cl_statement->column_names )
+        return SQL_ERROR;
 
     cl_statement -> data_type = malloc( sizeof( SQLSMALLINT ) 
             * cl_statement -> column_count );
+    if ( !cl_statement->data_type )
+        return SQL_ERROR;
 
     cl_statement -> column_size = malloc( sizeof( SQLULEN ) 
             * cl_statement -> column_count );
+    if ( !cl_statement->column_size )
+        return SQL_ERROR;
 
     cl_statement -> decimal_digits = malloc( sizeof( SQLSMALLINT ) 
             * cl_statement -> column_count );
+    if ( !cl_statement->decimal_digits )
+        return SQL_ERROR;
 
     for ( i = 1; i <= cl_statement -> column_count; i ++ )
     {