The present invention is concerned with 5-substituted benzoxazine derivatives of formula (I) wherein X, R1 and R2 are as described herein, as well as their manufacture, pharmaceutical compositions containing them. Compounds of the present invention are 5-HT5A receptor antagonists, and are useful in the prevention and/or treatment of depression, anxiety disorders, schizophrenia, panic disorders, agoraphobia, social phobia, obsessive compulsive disorders, post-traumatic stress disorders, pain, memory disorders, dementia, disorders of eating behaviors, sexual dysfunction, sleep disorders, abuse of drugs, motor disorders such as Parkinson's disease, psychiatric disorders or gastrointestinal disorders.