diff --git a/src/target/arm_dpm.c b/src/target/arm_dpm.c
index c5d797e6d..a9ce88071 100644
--- a/src/target/arm_dpm.c
+++ b/src/target/arm_dpm.c
@@ -55,7 +55,9 @@ static int dpm_mrc(struct target *target, int cpnum,
 	if (retval != ERROR_OK)
 		return retval;
 
-	LOG_DEBUG("MRC p%d, %d, r0, c%d, c%d, %d", cpnum, op1, CRn, CRm, op2);
+	LOG_DEBUG("MRC p%d, %d, r0, c%d, c%d, %d", cpnum,
+			(int) op1, (int) CRn,
+			(int) CRm, (int) op2);
 
 	/* read coprocessor register into R0; return via DCC */
 	retval = dpm->instr_read_data_r0(dpm,
@@ -78,7 +80,9 @@ static int dpm_mcr(struct target *target, int cpnum,
 	if (retval != ERROR_OK)
 		return retval;
 
-	LOG_DEBUG("MCR p%d, %d, r0, c%d, c%d, %d", cpnum, op1, CRn, CRm, op2);
+	LOG_DEBUG("MCR p%d, %d, r0, c%d, c%d, %d", cpnum,
+			(int) op1, (int) CRn,
+			(int) CRm, (int) op2);
 
 	/* read DCC into r0; then write coprocessor register from R0 */
 	retval = dpm->instr_write_data_r0(dpm,
diff --git a/src/target/arm_semihosting.c b/src/target/arm_semihosting.c
index 5e0a2bedc..2aa684f84 100644
--- a/src/target/arm_semihosting.c
+++ b/src/target/arm_semihosting.c
@@ -360,7 +360,8 @@ static int do_semihosting(struct target *target)
 		case 0x20028:	/* ADP_Stopped_DivisionByZero */
 		case 0x20029:	/* ADP_Stopped_OSSpecific */
 		default:
-			fprintf(stderr, "semihosting: exception %#x\n", r1);
+			fprintf(stderr, "semihosting: exception %#x\n",
+					(unsigned) r1);
 		}
 		return target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 
@@ -371,7 +372,8 @@ static int do_semihosting(struct target *target)
 	case 0x30:	/* SYS_ELAPSED */
 	case 0x31:	/* SYS_TICKFREQ */
 	default:
-		fprintf(stderr, "semihosting: unsupported call %#x\n", r0);
+		fprintf(stderr, "semihosting: unsupported call %#x\n",
+				(unsigned) r0);
 		result = -1;
 		semihosting_errno = ENOTSUP;
 	}