diff --git a/daemon/libs/iax2/md5.c b/daemon/libs/iax2/md5.c
index 656601f98b3094293a1b0c84f1015c41eea07301..d84c66b892db0c669258ddb057537078e6cfc77f 100644
--- a/daemon/libs/iax2/md5.c
+++ b/daemon/libs/iax2/md5.c
@@ -177,7 +177,7 @@ void IAX_MD5Final(uint8_t digest[16], struct IAX_MD5Context *ctx)
     IAX_MD5Transform(ctx->buf, (uint32_t *) ctx->in);
     IAX_byteReverse((uint8_t *) ctx->buf, 4);
     memcpy(digest, ctx->buf, 16);
-    memset(ctx, 0, sizeof(ctx));	/* In case it's sensitive */
+    memset(ctx, 0, sizeof(*ctx));	/* In case it's sensitive */
 }
 
 #ifndef ASM_MD5