diff --git a/src/netaddress.cpp b/src/netaddress.cpp
index ca148bfa515..eabab3dd993 100644
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -588,7 +588,7 @@ static std::string IPv6ToString(Span<const uint8_t> a, uint32_t scope_id)
     return r;
 }
 
-static std::string OnionToString(Span<const uint8_t> addr)
+std::string OnionToString(Span<const uint8_t> addr)
 {
     uint8_t checksum[torv3::CHECKSUM_LEN];
     torv3::Checksum(addr, checksum);
diff --git a/src/netaddress.h b/src/netaddress.h
index e52beb783d5..11086eaee0d 100644
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -111,6 +111,8 @@ static constexpr size_t ADDR_INTERNAL_SIZE = 10;
 /// SAM 3.1 and earlier do not support specifying ports and force the port to 0.
 static constexpr uint16_t I2P_SAM31_PORT{0};
 
+std::string OnionToString(Span<const uint8_t> addr);
+
 /**
  * Network address.
  */