diff --git a/src/cpu/csr.c b/src/cpu/csr.c
index e20b5d6..138d3ae 100644
--- a/src/cpu/csr.c
+++ b/src/cpu/csr.c
@@ -9,6 +9,10 @@ uint32_t csr_read(struct RV32_CPU* cpu, uint32_t csr)
 			return cpu->sim_ticks_done;
 		case CSR_SSTATUS:
 			return csr_read(cpu, CSR_MSTATUS);
+		case CSR_SIE:
+			return csr_read(cpu, CSR_MIE);
+		case CSR_SIP:
+			return csr_read(cpu, CSR_MIP);
 		default:
 			break;
 	}
@@ -23,6 +27,12 @@ void csr_write(struct RV32_CPU* cpu, uint32_t csr, uint32_t value)
 		case CSR_SSTATUS:
 			csr_write(cpu, CSR_MSTATUS, value);
 			return;
+		case CSR_SIE:
+			csr_write(cpu, CSR_MIE, value);
+			return;
+		case CSR_SIP:
+			csr_write(cpu, CSR_MIP, value);
+			return;
 		default:
 			break;
 	}