diff --git a/src/cmd/cgo/main.go b/src/cmd/cgo/main.go
index 3f8b7f816a..0906cebb31 100644
--- a/src/cmd/cgo/main.go
+++ b/src/cmd/cgo/main.go
@@ -134,25 +134,29 @@ func usage() {
 }
 
 var ptrSizeMap = map[string]int64{
-	"386":     4,
-	"amd64":   8,
-	"arm":     4,
-	"arm64":   8,
-	"ppc64":   8,
-	"ppc64le": 8,
-	"s390":    4,
-	"s390x":   8,
+	"386":      4,
+	"amd64":    8,
+	"arm":      4,
+	"arm64":    8,
+	"mips64":   8,
+	"mips64le": 8,
+	"ppc64":    8,
+	"ppc64le":  8,
+	"s390":     4,
+	"s390x":    8,
 }
 
 var intSizeMap = map[string]int64{
-	"386":     4,
-	"amd64":   8,
-	"arm":     4,
-	"arm64":   8,
-	"ppc64":   8,
-	"ppc64le": 8,
-	"s390":    4,
-	"s390x":   4,
+	"386":      4,
+	"amd64":    8,
+	"arm":      4,
+	"arm64":    8,
+	"mips64":   8,
+	"mips64le": 8,
+	"ppc64":    8,
+	"ppc64le":  8,
+	"s390":     4,
+	"s390x":    4,
 }
 
 var cPrefix string