diff --git a/cpu/riscv_common/irq_arch.c b/cpu/riscv_common/irq_arch.c
index ebd530f44b..f37b58e550 100644
--- a/cpu/riscv_common/irq_arch.c
+++ b/cpu/riscv_common/irq_arch.c
@@ -146,8 +146,8 @@ static void handle_trap(uword_t mcause)
 #ifdef DEVELHELP
             printf("Unhandled trap:\n");
             printf("  mcause: 0x%" PRIx32 "\n", trap);
-            printf("  mepc:   0x%" PRIx32 "\n", read_csr(mepc));
-            printf("  mtval:  0x%" PRIx32 "\n", read_csr(mtval));
+            printf("  mepc:   0x%lx\n", read_csr(mepc));
+            printf("  mtval:  0x%lx\n", read_csr(mtval));
 #endif
             /* Unknown trap */
             core_panic(PANIC_GENERAL_ERROR, "Unhandled trap");