diff --git a/src/hasher.cpp b/src/hasher.cpp
index a80dc9ae4..766fcf405 100644
--- a/src/hasher.cpp
+++ b/src/hasher.cpp
@@ -77,7 +77,7 @@ namespace libtorrent {
 
 	hasher& hasher::operator=(hasher const& h) &
 	{
-		if (this == &h) return;
+		if (this == &h) return *this;
 		gcry_md_close(m_context);
 		gcry_md_copy(&m_context, h.m_context);
 		return *this;
diff --git a/src/hasher512.cpp b/src/hasher512.cpp
index 76b91454d..5706e394c 100644
--- a/src/hasher512.cpp
+++ b/src/hasher512.cpp
@@ -70,7 +70,7 @@ namespace libtorrent {
 
 	hasher512& hasher512::operator=(hasher512 const& h) &
 	{
-		if (this == &h) return;
+		if (this == &h) return *this;
 		gcry_md_close(m_context);
 		gcry_md_copy(&m_context, h.m_context);
 		return *this;