diff --git a/src/conn.c b/src/conn.c
index 26df418..e35a735 100644
--- a/src/conn.c
+++ b/src/conn.c
@@ -681,7 +681,8 @@ void xmpp_conn_disable_tls(xmpp_conn_t * const conn)
 static void _log_open_tag(xmpp_conn_t *conn, char **attrs)
 {
     char buf[4096];
-    size_t len, pos;
+    size_t pos;
+    int len;
     int i;
     
     if (!attrs) return;
diff --git a/src/md5.c b/src/md5.c
index c4ac4ac..01231b1 100644
--- a/src/md5.c
+++ b/src/md5.c
@@ -148,7 +148,7 @@ void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
     PUT_32BIT_LSB_FIRST(digest + 4, ctx->buf[1]);
     PUT_32BIT_LSB_FIRST(digest + 8, ctx->buf[2]);
     PUT_32BIT_LSB_FIRST(digest + 12, ctx->buf[3]);
-    memset(ctx, 0, sizeof(ctx));	/* In case it's sensitive */
+    memset(ctx, 0, sizeof(*ctx));	/* In case it's sensitive */
 }
 
 #ifndef ASM_MD5
diff --git a/src/parser_libxml2.c b/src/parser_libxml2.c
index ab10a4b..1efe4fe 100644
--- a/src/parser_libxml2.c
+++ b/src/parser_libxml2.c
@@ -46,7 +46,7 @@ static void _set_attributes(xmpp_stanza_t *stanza, const xmlChar **attrs)
     if (!attrs) return;
 
     for (i = 0; attrs[i]; i += 2) {
-        xmpp_stanza_set_attribute(stanza, attrs[i], attrs[i+1]);
+        xmpp_stanza_set_attribute(stanza, (const char *)attrs[i], (const char *)attrs[i+1]);
     }
 }