diff --git a/unix/mkpost.go b/unix/mkpost.go
index 5624847c6..3d19d3fa7 100644
--- a/unix/mkpost.go
+++ b/unix/mkpost.go
@@ -101,6 +101,17 @@ func main() {
 		})
 	}
 
+	if goos == "solaris" {
+		// Convert *int8 to *byte in Iovec.Base like on every other platform.
+		convertIovecBase := regexp.MustCompile(`Base\s+\*int8`)
+		iovecType := regexp.MustCompile(`type Iovec struct {[^}]*}`)
+		iovecStructs := iovecType.FindAll(b, -1)
+		for _, s := range iovecStructs {
+			newNames := convertIovecBase.ReplaceAll(s, []byte("Base *byte"))
+			b = bytes.Replace(b, s, newNames, 1)
+		}
+	}
+
 	// Intentionally export __val fields in Fsid and Sigset_t
 	valRegex := regexp.MustCompile(`type (Fsid|Sigset_t) struct {(\s+)X__(bits|val)(\s+\S+\s+)}`)
 	b = valRegex.ReplaceAll(b, []byte("type $1 struct {${2}Val$4}"))
diff --git a/unix/types_solaris.go b/unix/types_solaris.go
index 98a4d8596..89e4c51e2 100644
--- a/unix/types_solaris.go
+++ b/unix/types_solaris.go
@@ -76,12 +76,6 @@ struct sockaddr_any {
 	char pad[sizeof(union sockaddr_all) - sizeof(struct sockaddr)];
 };
 
-// go_iovec is used to get *byte as the base address for Iovec.
-struct goIovec {
-	void*  iov_base;
-	size_t iov_len;
-};
-
 // Solaris and the major illumos distributions ship a 3rd party tun/tap driver
 // from https://github.com/kaizawa/tuntap
 // It supports a pair of IOCTLs defined at
@@ -164,7 +158,7 @@ type _Socklen C.socklen_t
 
 type Linger C.struct_linger
 
-type Iovec C.struct_goIovec
+type Iovec C.struct_iovec
 
 type IPMreq C.struct_ip_mreq