diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index a52163fd65..a469afa8dd 100644
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -1622,6 +1622,8 @@ func (p *Package) gccMachine() []string {
 		} else if gomips == "softfloat" {
 			return []string{"-mabi=32", "-msoft-float"}
 		}
+	case "loong64":
+		return []string{"-mabi=lp64d"}
 	}
 	return nil
 }
diff --git a/src/cmd/cgo/main.go b/src/cmd/cgo/main.go
index 364d8b81fb..21d895be26 100644
--- a/src/cmd/cgo/main.go
+++ b/src/cmd/cgo/main.go
@@ -175,6 +175,7 @@ var ptrSizeMap = map[string]int64{
 	"amd64":    8,
 	"arm":      4,
 	"arm64":    8,
+	"loong64":  8,
 	"m68k":     4,
 	"mips":     4,
 	"mipsle":   4,
@@ -200,6 +201,7 @@ var intSizeMap = map[string]int64{
 	"amd64":    8,
 	"arm":      4,
 	"arm64":    8,
+	"loong64":  8,
 	"m68k":     4,
 	"mips":     4,
 	"mipsle":   4,