diff --git a/clients/lcdproc/machine_Darwin.c b/clients/lcdproc/machine_Darwin.c
index f69a224..9ca08fb 100644
--- a/clients/lcdproc/machine_Darwin.c
+++ b/clients/lcdproc/machine_Darwin.c
@@ -67,7 +67,8 @@ static int swapmode(int *rettotal, int *retfree);
 
 static mach_port_t lcdproc_port;
 
-int machine_init()
+
+int machine_init(void)
 {
 	/* get the page size with "getpagesize" and calculate pageshift from it */
 	unsigned int pagesize = 0;
@@ -88,7 +89,7 @@ int machine_init()
 	return(TRUE);
 }
 
-int machine_close()
+int machine_close(void)
 {
 	return(TRUE);
 }
diff --git a/clients/lcdproc/machine_FreeBSD.c b/clients/lcdproc/machine_FreeBSD.c
index 5791318..03e4a5f 100644
--- a/clients/lcdproc/machine_FreeBSD.c
+++ b/clients/lcdproc/machine_FreeBSD.c
@@ -61,7 +61,8 @@ static int pageshift;
 #define pagetok(size) ((size) << pageshift)
 static int swapmode(int *retavail, int *retfree);
 
-int machine_init()
+
+int machine_init(void)
 {
 	/* get the page size with "getpagesize" and calculate pageshift from it */
 	int pagesize = getpagesize();
@@ -78,7 +79,7 @@ int machine_init()
 	return(TRUE);
 }
 
-int machine_close()
+int machine_close(void)
 {
 	return(TRUE);
 }
diff --git a/clients/lcdproc/machine_Linux.c b/clients/lcdproc/machine_Linux.c
index 4131691..3fa238b 100644
--- a/clients/lcdproc/machine_Linux.c
+++ b/clients/lcdproc/machine_Linux.c
@@ -61,7 +61,8 @@ static char procbuf[1024]; //TODO ugly hack!
 
 static FILE *mtab_fd;
 
-int machine_init()
+
+int machine_init(void)
 {
 	uptime_fd	= -1;
 	batt_fd		= -1;
@@ -115,7 +116,7 @@ int machine_init()
 	return(TRUE);
 }
 
-int machine_close()
+int machine_close(void)
 {
 	if (batt_fd >= 0)
 		close(batt_fd);
diff --git a/clients/lcdproc/machine_NetBSD.c b/clients/lcdproc/machine_NetBSD.c
index a8efbac..f2acdab 100644
--- a/clients/lcdproc/machine_NetBSD.c
+++ b/clients/lcdproc/machine_NetBSD.c
@@ -69,7 +69,8 @@ static int pageshift;
 #define pagetok(size) ((size) << pageshift)
 #define PROCSIZE(pp) ((pp)->p_vm_tsize + (pp)->p_vm_dsize + (pp)->p_vm_ssize)
 
-int machine_init()
+
+int machine_init(void)
 {
 	/* get the page size with "getpagesize" and calculate pageshift from it */
 	int pagesize = getpagesize();
@@ -86,7 +87,7 @@ int machine_init()
 	return(TRUE);
 }
 
-int machine_close()
+int machine_close(void)
 {
 	return(TRUE);
 }
diff --git a/clients/lcdproc/machine_OpenBSD.c b/clients/lcdproc/machine_OpenBSD.c
index d412cfc..7109b1c 100644
--- a/clients/lcdproc/machine_OpenBSD.c
+++ b/clients/lcdproc/machine_OpenBSD.c
@@ -60,7 +60,8 @@ static int pageshift;
 #define pagetok(size) ((size) << pageshift)
 #define PROCSIZE(pp) ((pp).vm_tsize + (pp).vm_dsize + (pp).vm_ssize)
 
-int machine_init()
+
+int machine_init(void)
 {
 	/* get the page size with "getpagesize" and calculate pageshift from it */
 	int pagesize = getpagesize();
@@ -77,7 +78,7 @@ int machine_init()
 	return(TRUE);
 }
 
-int machine_close()
+int machine_close(void)
 {
 	return(TRUE);
 }
diff --git a/clients/lcdproc/machine_SunOS.c b/clients/lcdproc/machine_SunOS.c
index 863a829..1bdb1cd 100644
--- a/clients/lcdproc/machine_SunOS.c
+++ b/clients/lcdproc/machine_SunOS.c
@@ -31,7 +31,7 @@
 
 static kstat_ctl_t *kc;
 
-int machine_init()
+int machine_init(void)
 {
 	kc = NULL;
 
@@ -45,7 +45,7 @@ int machine_init()
 	return(TRUE);
 }
 
-int machine_close()
+int machine_close(void)
 {
 	if (kc != NULL)
 	{