diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index e6decaa0a83..76bfba2486f 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -36,7 +36,7 @@ extern int errno;
 #include <math.h>
 
 #ifndef __STDC__
-extern double fmod();
+extern double fmod PROTO((double, double));
 #endif
 
 #ifdef HUGE_VAL
diff --git a/Parser/intrcheck.c b/Parser/intrcheck.c
index a3db360dce6..5162e25376b 100644
--- a/Parser/intrcheck.c
+++ b/Parser/intrcheck.c
@@ -126,9 +126,10 @@ intrcheck()
 
 static int interrupted;
 
+/* ARGSUSED */
 static SIGTYPE
 intcatcher(sig)
-	int sig;
+	int sig; /* Not used by required by interface */
 {
 	interrupted = 1;
 	signal(SIGINT, intcatcher);
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 324ecb071a9..efeabcc1a4e 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -315,8 +315,6 @@ builtin_input(self, v)
 {
 	FILE *in = sysgetfile("stdin", stdin);
 	FILE *out = sysgetfile("stdout", stdout);
-	node *n;
-	int err;
 	int c;
 	object *m, *d;
 	flushline();