diff --git a/libscan/ebook/ebook.c b/libscan/ebook/ebook.c
index 872e44e..67c0e90 100644
--- a/libscan/ebook/ebook.c
+++ b/libscan/ebook/ebook.c
@@ -102,7 +102,9 @@ int render_cover(scan_ebook_ctx_t *ctx, fz_context *fzctx, document_t *doc, fz_d
 
 void fz_err_callback(void *user, const char *message) {
     document_t *doc = (document_t *) user;
-    thread_ctx.logf(doc->filepath, LEVEL_WARNING,"FZ: %s", message);
+
+    const scan_ebook_ctx_t *ctx = &thread_ctx;
+    CTX_LOG_WARNINGF(doc->filepath, "FZ: %s", message);
 }
 
 static void init_fzctx(fz_context *fzctx, document_t *doc) {
diff --git a/libscan/mobi/scan_mobi.c b/libscan/mobi/scan_mobi.c
index aa87e81..87a4bc5 100644
--- a/libscan/mobi/scan_mobi.c
+++ b/libscan/mobi/scan_mobi.c
@@ -1,6 +1,7 @@
 #include "scan_mobi.h"
 
 #include <mobi.h>
+#include <errno.h>
 #include "stdlib.h"
 
 void parse_mobi(scan_mobi_ctx_t *ctx, vfile_t *f, document_t *doc) {
@@ -18,7 +19,7 @@ void parse_mobi(scan_mobi_ctx_t *ctx, vfile_t *f, document_t *doc) {
     if (file == NULL) {
         mobi_free(m);
         free(buf);
-        CTX_LOG_ERRORF(f->filepath, "fmemopen() failed: %d", ferror(file))
+        CTX_LOG_ERRORF(f->filepath, "fmemopen() failed (%d)", errno)
         return;
     }