diff --git a/examples/decode_to_md5.c b/examples/decode_to_md5.c
index a3843bed3..1ae7a4b57 100644
--- a/examples/decode_to_md5.c
+++ b/examples/decode_to_md5.c
@@ -71,7 +71,7 @@ static void print_md5(FILE *stream, unsigned char digest[16]) {
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name);
   exit(EXIT_FAILURE);
 }
diff --git a/examples/decode_with_drops.c b/examples/decode_with_drops.c
index 36f7d80e1..2233e473d 100644
--- a/examples/decode_with_drops.c
+++ b/examples/decode_with_drops.c
@@ -65,7 +65,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <infile> <outfile> <N-M|N/M>\n", exec_name);
   exit(EXIT_FAILURE);
 }
diff --git a/examples/postproc.c b/examples/postproc.c
index e34426a61..a8ac208d9 100644
--- a/examples/postproc.c
+++ b/examples/postproc.c
@@ -52,7 +52,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name);
   exit(EXIT_FAILURE);
 }
diff --git a/examples/resize_util.c b/examples/resize_util.c
index f8c35255f..e6fdd5bb2 100644
--- a/examples/resize_util.c
+++ b/examples/resize_util.c
@@ -15,6 +15,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "../tools_common.h"
 #include "../vp9/encoder/vp9_resize.h"
 
 static const char *exec_name = NULL;
@@ -26,7 +27,7 @@ static void usage() {
   printf("<output_yuv> [<frames>]\n");
 }
 
-void usage_exit() {
+void usage_exit(void) {
   usage();
   exit(EXIT_FAILURE);
 }
diff --git a/examples/set_maps.c b/examples/set_maps.c
index 5555baac2..1dc3ac0c9 100644
--- a/examples/set_maps.c
+++ b/examples/set_maps.c
@@ -55,7 +55,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n",
           exec_name);
   exit(EXIT_FAILURE);
diff --git a/examples/simple_decoder.c b/examples/simple_decoder.c
index 08a216685..8ccc81035 100644
--- a/examples/simple_decoder.c
+++ b/examples/simple_decoder.c
@@ -88,7 +88,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name);
   exit(EXIT_FAILURE);
 }
diff --git a/examples/simple_encoder.c b/examples/simple_encoder.c
index e805c2587..a30772973 100644
--- a/examples/simple_encoder.c
+++ b/examples/simple_encoder.c
@@ -106,7 +106,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr,
           "Usage: %s <codec> <width> <height> <infile> <outfile> "
               "<keyframe-interval> [<error-resilient>]\nSee comments in "
diff --git a/examples/twopass_encoder.c b/examples/twopass_encoder.c
index 0ec83ddcc..aecc11d3f 100644
--- a/examples/twopass_encoder.c
+++ b/examples/twopass_encoder.c
@@ -58,7 +58,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n",
           exec_name);
   exit(EXIT_FAILURE);
diff --git a/examples/vp8_multi_resolution_encoder.c b/examples/vp8_multi_resolution_encoder.c
index e623567b8..1052fc111 100644
--- a/examples/vp8_multi_resolution_encoder.c
+++ b/examples/vp8_multi_resolution_encoder.c
@@ -41,11 +41,11 @@
 #include "vpx/vpx_encoder.h"
 #include "vpx/vp8cx.h"
 #include "vpx_ports/mem_ops.h"
-#include "./tools_common.h"
+#include "../tools_common.h"
 #define interface (vpx_codec_vp8_cx())
 #define fourcc    0x30385056
 
-void usage_exit() {
+void usage_exit(void) {
   exit(EXIT_FAILURE);
 }
 
diff --git a/examples/vp8cx_set_ref.c b/examples/vp8cx_set_ref.c
index a2982821a..8b4cc303d 100644
--- a/examples/vp8cx_set_ref.c
+++ b/examples/vp8cx_set_ref.c
@@ -58,7 +58,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile> <frame>\n",
           exec_name);
   exit(EXIT_FAILURE);
diff --git a/examples/vp9_lossless_encoder.c b/examples/vp9_lossless_encoder.c
index 54275770d..827251683 100644
--- a/examples/vp9_lossless_encoder.c
+++ b/examples/vp9_lossless_encoder.c
@@ -20,7 +20,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "vp9_lossless_encoder: Example demonstrating VP9 lossless "
                   "encoding feature. Supports raw input only.\n");
   fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
diff --git a/examples/vp9_spatial_svc_encoder.c b/examples/vp9_spatial_svc_encoder.c
index f4deb693b..a3fd65f2a 100644
--- a/examples/vp9_spatial_svc_encoder.c
+++ b/examples/vp9_spatial_svc_encoder.c
@@ -116,7 +116,7 @@ typedef struct {
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   fprintf(stderr, "Usage: %s <options> input_filename output_filename\n",
           exec_name);
   fprintf(stderr, "Options:\n");
diff --git a/examples/vpx_temporal_svc_encoder.c b/examples/vpx_temporal_svc_encoder.c
index 349875997..964954e91 100644
--- a/examples/vpx_temporal_svc_encoder.c
+++ b/examples/vpx_temporal_svc_encoder.c
@@ -28,7 +28,7 @@
 
 static const char *exec_name;
 
-void usage_exit() {
+void usage_exit(void) {
   exit(EXIT_FAILURE);
 }
 
diff --git a/tools_common.h b/tools_common.h
index de6c38f0f..b92980aba 100644
--- a/tools_common.h
+++ b/tools_common.h
@@ -119,7 +119,7 @@ void warn(const char *fmt, ...);
 void die_codec(vpx_codec_ctx_t *ctx, const char *s) VPX_NO_RETURN;
 
 /* The tool including this file must define usage_exit() */
-void usage_exit() VPX_NO_RETURN;
+void usage_exit(void) VPX_NO_RETURN;
 
 #undef VPX_NO_RETURN
 
diff --git a/vpxdec.c b/vpxdec.c
index 8c938df8d..c7736abdb 100644
--- a/vpxdec.c
+++ b/vpxdec.c
@@ -169,7 +169,7 @@ static INLINE int libyuv_scale(vpx_image_t *src, vpx_image_t *dst,
 }
 #endif
 
-void usage_exit() {
+void usage_exit(void) {
   int i;
 
   fprintf(stderr, "Usage: %s <options> filename\n\n"
diff --git a/vpxenc.c b/vpxenc.c
index 851d43291..850e1838a 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -467,7 +467,7 @@ static const int vp9_arg_ctrl_map[] = {
 
 static const arg_def_t *no_args[] = { NULL };
 
-void usage_exit() {
+void usage_exit(void) {
   int i;
 
   fprintf(stderr, "Usage: %s <options> -o dst_filename src_filename \n",