diff --git a/auto/bin/make_init.pl b/auto/bin/make_init.pl
index 22b29c0..e0b2e53 100755
--- a/auto/bin/make_init.pl
+++ b/auto/bin/make_init.pl
@@ -51,7 +51,7 @@ if (@ARGV)
 		if (keys %$functions or keys @$reuse)
 		{
 			print "#ifdef $extname\n\n";
-			print "static GLboolean _glewInit_$extname ()\n{\n  GLboolean r = GL_FALSE;\n";
+			print "static GLboolean _glewInit_$extname (void)\n{\n  GLboolean r = GL_FALSE;\n";
 			output_reuse($reuse, \&make_reuse_call);
 			output_decls($functions, \&make_pfn_def_init);
 			print "\n  return r;\n}\n\n";
diff --git a/auto/bin/make_initd.pl b/auto/bin/make_initd.pl
index ea3e0fb..3235f62 100755
--- a/auto/bin/make_initd.pl
+++ b/auto/bin/make_initd.pl
@@ -38,7 +38,7 @@ if (@ARGV)
 		#print "#ifdef $extname\n\n";
 		if (keys %$functions)
 		{
-			print "static GLboolean _glewInit_$extname ();\n";
+			print "static GLboolean _glewInit_$extname (void);\n";
 		}
 		#print "#endif /* $extname */\n\n";
 	}
diff --git a/auto/src/glew_init_glx.c b/auto/src/glew_init_glx.c
index 8397827..0dbd2cf 100644
--- a/auto/src/glew_init_glx.c
+++ b/auto/src/glew_init_glx.c
@@ -12,7 +12,7 @@ GLboolean glxewGetExtension (const char* name)
   return _glewSearchExtension(name, start, end);
 }
 
-GLenum glxewInit ()
+GLenum glxewInit (void)
 {
   Display* display;
   int major, minor;
diff --git a/auto/src/glew_init_wgl.c b/auto/src/glew_init_wgl.c
index 978cf3c..689e736 100644
--- a/auto/src/glew_init_wgl.c
+++ b/auto/src/glew_init_wgl.c
@@ -20,7 +20,7 @@ GLboolean GLEWAPIENTRY wglewGetExtension (const char* name)
   return _glewSearchExtension(name, start, end);
 }
 
-GLenum GLEWAPIENTRY wglewInit ()
+GLenum GLEWAPIENTRY wglewInit (void)
 {
   GLboolean crippled;
   const GLubyte* extStart;
diff --git a/auto/src/glewinfo_glx.c b/auto/src/glewinfo_glx.c
index e60b549..7f98417 100644
--- a/auto/src/glewinfo_glx.c
+++ b/auto/src/glewinfo_glx.c
@@ -2,5 +2,5 @@
 
 #elif !defined(GLEW_EGL) && !defined(GLEW_OSMESA) /* _UNIX */
 
-static void glxewInfo ()
+static void glxewInfo (void)
 {
diff --git a/auto/src/glewinfo_head.c b/auto/src/glewinfo_head.c
index 79ed785..0f7e672 100644
--- a/auto/src/glewinfo_head.c
+++ b/auto/src/glewinfo_head.c
@@ -49,7 +49,7 @@ GLboolean glewCreateContext (struct createParams *params);
 
 GLboolean glewParseArgs (int argc, char** argv, struct createParams *);
 
-void glewDestroyContext ();
+void glewDestroyContext (void);
 
 /* ------------------------------------------------------------------------- */
 
diff --git a/auto/src/glewinfo_tail.c b/auto/src/glewinfo_tail.c
index 10448d4..4273c97 100644
--- a/auto/src/glewinfo_tail.c
+++ b/auto/src/glewinfo_tail.c
@@ -300,7 +300,7 @@ GLboolean glewCreateContext (struct createParams *params)
   return GL_FALSE;
 }
 
-void glewDestroyContext ()
+void glewDestroyContext (void)
 {
   if (NULL != ctx) eglDestroyContext(display, ctx);
 }
@@ -328,7 +328,7 @@ GLboolean glewCreateContext (struct createParams *params)
   return GL_FALSE;
 }
 
-void glewDestroyContext ()
+void glewDestroyContext (void)
 {
   if (NULL != ctx) OSMesaDestroyContext(ctx);
 }
@@ -413,7 +413,7 @@ GLboolean glewCreateContext (struct createParams* params)
   return GL_FALSE;
 }
 
-void glewDestroyContext ()
+void glewDestroyContext (void)
 {
   if (NULL != rc) wglMakeCurrent(NULL, NULL);
   if (NULL != rc) wglDeleteContext(rc);
@@ -471,7 +471,7 @@ GLboolean glewCreateContext (struct createParams *params)
   return GL_FALSE;
 }
 
-void glewDestroyContext ()
+void glewDestroyContext (void)
 {
   CGLSetCurrentContext(octx);
   CGLReleaseContext(ctx);
@@ -488,7 +488,7 @@ GLboolean glewCreateContext (struct createParams *params)
   return GL_FALSE;
 }
 
-void glewDestroyContext ()
+void glewDestroyContext (void)
 {
   /* TODO: Haiku: We need to call C++ code here */
 }
@@ -596,7 +596,7 @@ GLboolean glewCreateContext (struct createParams *params)
   return GL_FALSE;
 }
 
-void glewDestroyContext ()
+void glewDestroyContext (void)
 {
   if (NULL != dpy && NULL != ctx) glXDestroyContext(dpy, ctx);
   if (NULL != dpy && 0 != wnd) XDestroyWindow(dpy, wnd);
diff --git a/auto/src/glxew_tail.h b/auto/src/glxew_tail.h
index 05ff1b1..aac6dbf 100644
--- a/auto/src/glxew_tail.h
+++ b/auto/src/glxew_tail.h
@@ -1,6 +1,6 @@
 /* ------------------------------------------------------------------------ */
 
-GLEWAPI GLenum GLEWAPIENTRY glxewInit ();
+GLEWAPI GLenum GLEWAPIENTRY glxewInit (void);
 GLEWAPI GLboolean GLEWAPIENTRY glxewIsSupported (const char *name);
 
 #ifndef GLXEW_GET_VAR
diff --git a/auto/src/wglew_tail.h b/auto/src/wglew_tail.h
index 8971158..411e0eb 100644
--- a/auto/src/wglew_tail.h
+++ b/auto/src/wglew_tail.h
@@ -1,6 +1,6 @@
 /* ------------------------------------------------------------------------- */
 
-GLEWAPI GLenum GLEWAPIENTRY wglewInit ();
+GLEWAPI GLenum GLEWAPIENTRY wglewInit (void);
 GLEWAPI GLboolean GLEWAPIENTRY wglewIsSupported (const char *name);
 
 #ifndef WGLEW_GET_VAR