diff --git a/src/target/arm_semihosting.c b/src/target/arm_semihosting.c
index 61f1e7801..723be577e 100644
--- a/src/target/arm_semihosting.c
+++ b/src/target/arm_semihosting.c
@@ -315,7 +315,7 @@ int arm_semihosting(struct target *target, int *retval)
 		if (0 <= semihosting->op && semihosting->op <= 0x31) {
 			*retval = semihosting_common(target);
 			if (*retval != ERROR_OK) {
-				LOG_ERROR("Failed semihosting operation");
+				LOG_ERROR("Failed semihosting operation (0x%02X)", semihosting->op);
 				return 0;
 			}
 		} else {
diff --git a/src/target/riscv/riscv_semihosting.c b/src/target/riscv/riscv_semihosting.c
index 99d6c7713..c0e81eae4 100644
--- a/src/target/riscv/riscv_semihosting.c
+++ b/src/target/riscv/riscv_semihosting.c
@@ -140,7 +140,7 @@ semihosting_result_t riscv_semihosting(struct target *target, int *retval)
 		if (0 <= semihosting->op && semihosting->op <= 0x31) {
 			*retval = semihosting_common(target);
 			if (*retval != ERROR_OK) {
-				LOG_ERROR("Failed semihosting operation");
+				LOG_ERROR("Failed semihosting operation (0x%02X)", semihosting->op);
 				return SEMI_ERROR;
 			}
 		} else {