diff --git a/src/ctx.h b/src/ctx.h
index 07ca3c2..d6c14b1 100644
--- a/src/ctx.h
+++ b/src/ctx.h
@@ -41,6 +41,7 @@ typedef struct {
     int fast;
 
     GHashTable *dbg_current_files;
+    pthread_mutex_t dbg_current_files_mu;
 
     scan_arc_ctx_t arc_ctx;
     scan_comic_ctx_t comic_ctx;
diff --git a/src/main.c b/src/main.c
index e1fd9ca..420f97f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -168,7 +168,8 @@ void initialize_scan_context(scan_args_t *args) {
         ScanCtx.arc_ctx.passphrase[0] = 0;
     }
 
-    ScanCtx.dbg_current_files = g_hash_table_new(g_int64_hash, g_int64_equal);
+    ScanCtx.dbg_current_files = g_hash_table_new_full(g_int64_hash, g_int64_equal, NULL, NULL);
+    pthread_mutex_init(&ScanCtx.dbg_current_files_mu, NULL);
 
     // Comic
     ScanCtx.comic_ctx.log = _log;
diff --git a/src/parsing/parse.c b/src/parsing/parse.c
index 46bac17..ab0b36c 100644
--- a/src/parsing/parse.c
+++ b/src/parsing/parse.c
@@ -43,7 +43,9 @@ void fs_reset(struct vfile *f) {
 
 void set_dbg_current_file(parse_job_t *job) {
     unsigned long long pid = (unsigned long long) pthread_self();
+    pthread_mutex_lock(&ScanCtx.dbg_current_files_mu);
     g_hash_table_replace(ScanCtx.dbg_current_files, GINT_TO_POINTER(pid), job);
+    pthread_mutex_unlock(&ScanCtx.dbg_current_files_mu);
 }
 
 void parse(void *arg) {