diff --git a/sys/boot/amd64/efi/copy.c b/sys/boot/amd64/efi/copy.c
index bebe42ed5ec2..c6cc3490817a 100644
--- a/sys/boot/amd64/efi/copy.c
+++ b/sys/boot/amd64/efi/copy.c
@@ -51,8 +51,8 @@ x86_efi_copy_init(void)
 	status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
 	    STAGE_PAGES, &staging);
 	if (EFI_ERROR(status)) {
-		printf("failed to allocate staging area: %d\n",
-		    status & EFI_ERROR_MASK);
+		printf("failed to allocate staging area: %lu\n",
+		    (unsigned long)(status & EFI_ERROR_MASK));
 		return (status);
 	}
 
diff --git a/sys/boot/amd64/efi/elf64_freebsd.c b/sys/boot/amd64/efi/elf64_freebsd.c
index af5b10853f4f..0fb82b062bb9 100644
--- a/sys/boot/amd64/efi/elf64_freebsd.c
+++ b/sys/boot/amd64/efi/elf64_freebsd.c
@@ -101,7 +101,7 @@ elf64_exec(struct preloaded_file *fp)
 		rsdp = efi_get_table(&acpi_guid);
 	}
 	if (rsdp != NULL) {
-		sprintf(buf, "0x%016llx", rsdp);
+		sprintf(buf, "0x%016llx", (unsigned long long)rsdp);
 		setenv("hint.acpi.0.rsdp", buf, 1);
 		revision = rsdp->Revision;
 		if (revision == 0)
@@ -115,7 +115,8 @@ elf64_exec(struct preloaded_file *fp)
 		setenv("hint.acpi.0.rsdt", buf, 1);
 		if (revision >= 2) {
 			/* XXX extended checksum? */
-			sprintf(buf, "0x%016llx", rsdp->XsdtPhysicalAddress);
+			sprintf(buf, "0x%016llx",
+			    (unsigned long long)rsdp->XsdtPhysicalAddress);
 			setenv("hint.acpi.0.xsdt", buf, 1);
 			sprintf(buf, "%d", rsdp->Length);
 			setenv("hint.acpi.0.xsdt_length", buf, 1);
diff --git a/sys/boot/amd64/efi/main.c b/sys/boot/amd64/efi/main.c
index 0a0fa77d8526..d1ea9c3f00be 100644
--- a/sys/boot/amd64/efi/main.c
+++ b/sys/boot/amd64/efi/main.c
@@ -304,7 +304,7 @@ command_mode(int argc, char *argv[])
 			printf("couldn't set mode %d\n", mode);
 			return (CMD_ERROR);
 		}
-		sprintf(rowenv, "%d", rows);
+		sprintf(rowenv, "%u", (unsigned)rows);
 		setenv("LINES", rowenv, 1);
 
 		return (CMD_OK);
@@ -314,7 +314,8 @@ command_mode(int argc, char *argv[])
 		status = conout->QueryMode(conout, i, &cols, &rows);
 		if (EFI_ERROR(status))
 			break;
-		printf("Mode %d: %d columns, %d rows\n", i, cols, rows);
+		printf("Mode %d: %u columns, %u rows\n", i, (unsigned)cols,
+		    (unsigned)rows);
 	}
 
 	if (i != 0)