diff --git a/hashtable.c b/hashtable.c
index 7939be7e..165bb3a8 100644
--- a/hashtable.c
+++ b/hashtable.c
@@ -392,6 +392,8 @@ int htwcscmp(const void *s1, const void *s2)
     return wcscmp((const wchar_t *) s1, (const wchar_t *) s2);
 }
 
+#if 0
+
 /* A comparison function for key-value pairs with multibyte-string keys.
  * The arguments are pointers to kvpair_T's (const kvpair_T *) whose keys are
  * multibyte strings. */
@@ -400,6 +402,8 @@ int keystrcoll(const void *k1, const void *k2)
     return strcoll(((const kvpair_T *) k1)->key, ((const kvpair_T *) k2)->key);
 }
 
+#endif
+
 /* A comparison function for key-value pairs with wide-string keys.
  * The arguments are pointers to kvpair_T's (const kvpair_T *) whose keys are
  * wide strings. */
@@ -408,6 +412,8 @@ int keywcscoll(const void *k1, const void *k2)
     return wcscoll(((const kvpair_T *) k1)->key, ((const kvpair_T *) k2)->key);
 }
 
+#if 0
+
 /* `Free's the key of the specified key-value pair.
  * Can be used as the freer function to `ht_clear'. */
 void kfree(kvpair_T kv)
@@ -415,6 +421,8 @@ void kfree(kvpair_T kv)
     free(kv.key);
 }
 
+#endif
+
 /* `Free's the value of the specified key-value pair.
  * Can be used as the freer function to `ht_clear'. */
 void vfree(kvpair_T kv)
@@ -422,6 +430,8 @@ void vfree(kvpair_T kv)
     free(kv.value);
 }
 
+#if 0
+
 /* `Free's the key and the value of the specified key-value pair.
  * Can be used as the freer function to `ht_clear'. */
 void kvfree(kvpair_T kv)
@@ -430,6 +440,8 @@ void kvfree(kvpair_T kv)
     free(kv.value);
 }
 
+#endif
+
 
 #if DEBUG_HASH
 /* Prints statistics.
diff --git a/job.h b/job.h
index ff5ea5de..5834b33c 100644
--- a/job.h
+++ b/job.h
@@ -73,7 +73,6 @@ extern void set_active_job(job_T *job)
     __attribute__((nonnull));
 extern size_t add_job(_Bool current);
 extern void remove_job(size_t jobnumber);
-extern void remove_job_nofitying_signal(size_t jobnumber);
 extern void remove_all_jobs(void);
 extern void neglect_all_jobs(void);
 extern size_t job_count(void)
diff --git a/lineedit/complete.h b/lineedit/complete.h
index 19ad52ce..8a0998d0 100644
--- a/lineedit/complete.h
+++ b/lineedit/complete.h
@@ -200,8 +200,6 @@ extern void le_compdebug(const char *format, ...)
 
 extern void set_completion_variables(void);
 
-extern void le_new_command_candidate(wchar_t *cmdname)
-    __attribute__((nonnull));
 extern void le_new_candidate(le_candtype_T type,
         wchar_t *restrict value, wchar_t *restrict desc,
         const le_compopt_T *compopt)
diff --git a/path.c b/path.c
index f0d51b71..c4f13b8d 100644
--- a/path.c
+++ b/path.c
@@ -86,6 +86,8 @@ bool is_regular_file(const char *path)
     return (stat(path, &st) == 0) && S_ISREG(st.st_mode);
 }
 
+#if 0
+
 /* Checks if `path' is a non-regular file. */
 bool is_irregular_file(const char *path)
 {
@@ -93,6 +95,8 @@ bool is_irregular_file(const char *path)
     return (stat(path, &st) == 0) && !S_ISREG(st.st_mode);
 }
 
+#endif
+
 /* Checks if `path' is a readable file. */
 bool is_readable(const char *path)
 {
diff --git a/path.h b/path.h
index ddb716d0..6b5c8bf8 100644
--- a/path.h
+++ b/path.h
@@ -74,7 +74,6 @@ extern void init_cmdhash(void);
 extern void clear_cmdhash(void);
 extern const char *get_command_path(const char *name, _Bool forcelookup)
     __attribute__((nonnull));
-extern void fill_cmdhash(const char *prefix, _Bool ignorecase);
 extern const char *get_command_path_default(const char *name)
     __attribute__((nonnull));