diff --git a/src/unix/gsocket.cpp b/src/unix/gsocket.cpp
index dc9b244394..6534d612d1 100644
--- a/src/unix/gsocket.cpp
+++ b/src/unix/gsocket.cpp
@@ -2068,6 +2068,7 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
     struct hostent h;
 #if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
     struct hostent_data buffer;
+    memset(&buffer, 0, sizeof(buffer));
 #else
     char buffer[1024];
 #endif
@@ -2125,6 +2126,7 @@ GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
 
 #if defined(HAVE_FUNC_GETSERVBYNAME_R_4)
     struct servent_data buffer;
+    memset(&buffer, 0, sizeof(buffer));
 #else
   char buffer[1024];
 #endif
@@ -2183,6 +2185,7 @@ GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t
   struct hostent temphost;
 #if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
   struct hostent_data buffer;
+  memset(&buffer, 0, sizeof(buffer));
 #else
   char buffer[1024];
 #endif