diff --git a/libi2pd/Poly1305.cpp b/libi2pd/Poly1305.cpp
index fdfee5bc..9ee46640 100644
--- a/libi2pd/Poly1305.cpp
+++ b/libi2pd/Poly1305.cpp
@@ -136,7 +136,7 @@ namespace crypto
 #if (__GNUC__ == 4) && (__GNUC_MINOR__ < 8) // older than gcc 4.8
 		Poly1305(const uint8_t * key) : m_Leftover(0), m_Final(0)
 		{
-			memset (m_H, 0, sizeof (m_H));
+			memset (&m_H, 0, sizeof (m_H));
 #else 
 		Poly1305(const uint8_t * key) : m_Leftover(0), m_H{0}, m_Final(0)
 		{