diff --git a/programs/hash/generic_sum.c b/programs/hash/generic_sum.c
index 9183874..a49dbb7 100644
--- a/programs/hash/generic_sum.c
+++ b/programs/hash/generic_sum.c
@@ -42,11 +42,8 @@
 #endif
 
 #if !defined(POLARSSL_MD_C) || !defined(POLARSSL_FS_IO)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_MD_C and/or POLARSSL_FS_IO not defined.\n");
     return( 0 );
 }
diff --git a/programs/hash/hello.c b/programs/hash/hello.c
index 384ade1..c774110 100644
--- a/programs/hash/hello.c
+++ b/programs/hash/hello.c
@@ -38,24 +38,18 @@
 #endif
 
 #if !defined(POLARSSL_MD5_C)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_MD5_C not defined.\n");
     return( 0 );
 }
 #else
-int main( int argc, char *argv[] )
+int main( void )
 {
     int i;
     unsigned char digest[16];
     char str[] = "Hello, world!";
 
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf( "\n  MD5('%s') = ", str );
 
     md5( (unsigned char *) str, 13, digest );
diff --git a/programs/hash/md5sum.c b/programs/hash/md5sum.c
index 318fb77..afe3454 100644
--- a/programs/hash/md5sum.c
+++ b/programs/hash/md5sum.c
@@ -42,11 +42,8 @@
 #endif
 
 #if !defined(POLARSSL_MD5_C) || !defined(POLARSSL_FS_IO)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_MD5_C and/or POLARSSL_FS_IO not defined.\n");
     return( 0 );
 }
diff --git a/programs/hash/sha1sum.c b/programs/hash/sha1sum.c
index 1e247d8..8dc4e08 100644
--- a/programs/hash/sha1sum.c
+++ b/programs/hash/sha1sum.c
@@ -42,11 +42,8 @@
 #endif
 
 #if !defined(POLARSSL_SHA1_C) || !defined(POLARSSL_FS_IO)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_SHA1_C and/or POLARSSL_FS_IO not defined.\n");
     return( 0 );
 }
diff --git a/programs/hash/sha2sum.c b/programs/hash/sha2sum.c
index a9c5698..268d170 100644
--- a/programs/hash/sha2sum.c
+++ b/programs/hash/sha2sum.c
@@ -42,11 +42,8 @@
 #endif
 
 #if !defined(POLARSSL_SHA256_C) || !defined(POLARSSL_FS_IO)
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     polarssl_printf("POLARSSL_SHA256_C and/or POLARSSL_FS_IO not defined.\n");
     return( 0 );
 }