diff --git a/src/core/core-debug.c b/src/core/core-debug.c
index 049b4edad..d16ecf103 100644
--- a/src/core/core-debug.c
+++ b/src/core/core-debug.c
@@ -228,8 +228,11 @@ debug_dump_cb (const void *pointer, void *data,
  */
 
 void
-debug_sigsegv_cb (int)
+debug_sigsegv_cb (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     debug_dump (1);
     unhook_all ();
     gui_main_end (0);
diff --git a/src/core/core-debug.h b/src/core/core-debug.h
index cff61736b..b9b15fe55 100644
--- a/src/core/core-debug.h
+++ b/src/core/core-debug.h
@@ -27,7 +27,7 @@ struct t_gui_window_tree;
 extern long long debug_long_callbacks;
 
 extern void debug_build_info ();
-extern void debug_sigsegv_cb (int);
+extern void debug_sigsegv_cb (int signo);
 extern void debug_windows_tree ();
 extern void debug_memory ();
 extern void debug_hdata ();
diff --git a/src/core/core-signal.c b/src/core/core-signal.c
index c04551b88..725878cc5 100644
--- a/src/core/core-signal.c
+++ b/src/core/core-signal.c
@@ -65,8 +65,11 @@ volatile sig_atomic_t signal_sigusr2_count = 0;
  */
 
 void
-signal_sighup_cb (int)
+signal_sighup_cb (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     signal_sighup_count++;
 }
 
@@ -75,8 +78,11 @@ signal_sighup_cb (int)
  */
 
 void
-signal_sigquit_cb (int)
+signal_sigquit_cb (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     signal_sigquit_count++;
 }
 
@@ -85,8 +91,11 @@ signal_sigquit_cb (int)
  */
 
 void
-signal_sigterm_cb (int)
+signal_sigterm_cb (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     signal_sigterm_count++;
 }
 
@@ -95,8 +104,11 @@ signal_sigterm_cb (int)
  */
 
 void
-signal_sigusr1_cb (int)
+signal_sigusr1_cb (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     signal_sigusr1_count++;
 }
 
@@ -105,8 +117,11 @@ signal_sigusr1_cb (int)
  */
 
 void
-signal_sigusr2_cb (int)
+signal_sigusr2_cb (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     signal_sigusr2_count++;
 }
 
diff --git a/src/gui/curses/gui-curses-main.c b/src/gui/curses/gui-curses-main.c
index 071d7d7a5..d8eabf1fc 100644
--- a/src/gui/curses/gui-curses-main.c
+++ b/src/gui/curses/gui-curses-main.c
@@ -150,8 +150,11 @@ gui_main_get_password (const char **prompt, char *password, int size)
  */
 
 void
-gui_main_signal_sigint (int)
+gui_main_signal_sigint (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     weechat_quit = 1;
 }
 
@@ -253,8 +256,11 @@ gui_main_init ()
  */
 
 void
-gui_main_signal_sigwinch (int)
+gui_main_signal_sigwinch (int signo)
 {
+    /* make C compiler happy */
+    (void) signo;
+
     gui_signal_sigwinch_received = 1;
 }