diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index 421fa35857988e2c203c086e2dfb5aaab628491b..28a0d1cb374c8c25ce4032da874b974712ca3129 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -54,6 +54,7 @@
 /* Interrupt Enable and Interrupt Pending flags */
 #define SIE_SSIE _AC(0x00000002, UL) /* Software Interrupt Enable */
 #define SIE_STIE _AC(0x00000020, UL) /* Timer Interrupt Enable */
+#define SIE_SEIE _AC(0x00000200, UL) /* External Interrupt Enable */
 
 #define EXC_INST_MISALIGNED     0
 #define EXC_INST_ACCESS         1