diff --git a/OpenCL/m01600.cl b/OpenCL/m01600.cl
index 4dea2179a..9fb95b005 100644
--- a/OpenCL/m01600.cl
+++ b/OpenCL/m01600.cl
@@ -20,8 +20,8 @@
 #define COMPARE_S "OpenCL/check_single_comp4.c"
 #define COMPARE_M "OpenCL/check_multi_comp4.c"
 
-#define md5apr1_magic0 0x72706124
-#define md5apr1_magic1 0x00002431
+#define md5apr1_magic0 0x72706124u
+#define md5apr1_magic1 0x00002431u
 
 static void md5_transform (const u32 w0[4], const u32 w1[4], const u32 w2[4], const u32 w3[4], u32 digest[4])
 {
@@ -449,21 +449,21 @@ static void append_sign (u32 block0[4], u32 block1[4], const u32 block_len)
       break;
 
     case 1:
-      block0[0] = block0[0]            | md5apr1_magic0 <<  8;
-      block0[1] = md5apr1_magic0 >> 24 | md5apr1_magic1 <<  8;
-      block0[2] = md5apr1_magic1 >> 24;
+      block0[0] = block0[0]             | md5apr1_magic0 <<  8u;
+      block0[1] = md5apr1_magic0 >> 24u | md5apr1_magic1 <<  8u;
+      block0[2] = md5apr1_magic1 >> 24u;
       break;
 
     case 2:
-      block0[0] = block0[0]            | md5apr1_magic0 << 16;
-      block0[1] = md5apr1_magic0 >> 16 | md5apr1_magic1 << 16;
-      block0[2] = md5apr1_magic1 >> 16;
+      block0[0] = block0[0]             | md5apr1_magic0 << 16u;
+      block0[1] = md5apr1_magic0 >> 16u | md5apr1_magic1 << 16u;
+      block0[2] = md5apr1_magic1 >> 16u;
       break;
 
     case 3:
-      block0[0] = block0[0]            | md5apr1_magic0 << 24;
-      block0[1] = md5apr1_magic0 >>  8 | md5apr1_magic1 << 24;
-      block0[2] = md5apr1_magic1 >>  8;
+      block0[0] = block0[0]             | md5apr1_magic0 << 24u;
+      block0[1] = md5apr1_magic0 >>  8u | md5apr1_magic1 << 24u;
+      block0[2] = md5apr1_magic1 >>  8u;
       break;
 
     case 4:
@@ -472,21 +472,21 @@ static void append_sign (u32 block0[4], u32 block1[4], const u32 block_len)
       break;
 
     case 5:
-      block0[1] = block0[1]            | md5apr1_magic0 <<  8;
-      block0[2] = md5apr1_magic0 >> 24 | md5apr1_magic1 <<  8;
-      block0[3] = md5apr1_magic1 >> 24;
+      block0[1] = block0[1]             | md5apr1_magic0 <<  8u;
+      block0[2] = md5apr1_magic0 >> 24u | md5apr1_magic1 <<  8u;
+      block0[3] = md5apr1_magic1 >> 24u;
       break;
 
     case 6:
-      block0[1] = block0[1]            | md5apr1_magic0 << 16;
-      block0[2] = md5apr1_magic0 >> 16 | md5apr1_magic1 << 16;
-      block0[3] = md5apr1_magic1 >> 16;
+      block0[1] = block0[1]             | md5apr1_magic0 << 16u;
+      block0[2] = md5apr1_magic0 >> 16u | md5apr1_magic1 << 16u;
+      block0[3] = md5apr1_magic1 >> 16u;
       break;
 
     case 7:
-      block0[1] = block0[1]            | md5apr1_magic0 << 24;
-      block0[2] = md5apr1_magic0 >>  8 | md5apr1_magic1 << 24;
-      block0[3] = md5apr1_magic1 >>  8;
+      block0[1] = block0[1]             | md5apr1_magic0 << 24u;
+      block0[2] = md5apr1_magic0 >>  8u | md5apr1_magic1 << 24u;
+      block0[3] = md5apr1_magic1 >>  8u;
       break;
 
     case 8:
@@ -495,21 +495,21 @@ static void append_sign (u32 block0[4], u32 block1[4], const u32 block_len)
       break;
 
     case 9:
-      block0[2] = block0[2]            | md5apr1_magic0 <<  8;
-      block0[3] = md5apr1_magic0 >> 24 | md5apr1_magic1 <<  8;
-      block1[0] = md5apr1_magic1 >> 24;
+      block0[2] = block0[2]             | md5apr1_magic0 <<  8u;
+      block0[3] = md5apr1_magic0 >> 24u | md5apr1_magic1 <<  8u;
+      block1[0] = md5apr1_magic1 >> 24u;
       break;
 
     case 10:
-      block0[2] = block0[2]            | md5apr1_magic0 << 16;
-      block0[3] = md5apr1_magic0 >> 16 | md5apr1_magic1 << 16;
-      block1[0] = md5apr1_magic1 >> 16;
+      block0[2] = block0[2]             | md5apr1_magic0 << 16u;
+      block0[3] = md5apr1_magic0 >> 16u | md5apr1_magic1 << 16u;
+      block1[0] = md5apr1_magic1 >> 16u;
       break;
 
     case 11:
-      block0[2] = block0[2]            | md5apr1_magic0 << 24;
-      block0[3] = md5apr1_magic0 >>  8 | md5apr1_magic1 << 24;
-      block1[0] = md5apr1_magic1 >>  8;
+      block0[2] = block0[2]             | md5apr1_magic0 << 24u;
+      block0[3] = md5apr1_magic0 >>  8u | md5apr1_magic1 << 24u;
+      block1[0] = md5apr1_magic1 >>  8u;
       break;
 
     case 12:
@@ -518,21 +518,21 @@ static void append_sign (u32 block0[4], u32 block1[4], const u32 block_len)
       break;
 
     case 13:
-      block0[3] = block0[3]            | md5apr1_magic0 <<  8;
-      block1[0] = md5apr1_magic0 >> 24 | md5apr1_magic1 <<  8;
-      block1[1] = md5apr1_magic1 >> 24;
+      block0[3] = block0[3]             | md5apr1_magic0 <<  8u;
+      block1[0] = md5apr1_magic0 >> 24u | md5apr1_magic1 <<  8u;
+      block1[1] = md5apr1_magic1 >> 24u;
       break;
 
     case 14:
-      block0[3] = block0[3]            | md5apr1_magic0 << 16;
-      block1[0] = md5apr1_magic0 >> 16 | md5apr1_magic1 << 16;
-      block1[1] = md5apr1_magic1 >> 16;
+      block0[3] = block0[3]             | md5apr1_magic0 << 16u;
+      block1[0] = md5apr1_magic0 >> 16u | md5apr1_magic1 << 16u;
+      block1[1] = md5apr1_magic1 >> 16u;
       break;
 
     case 15:
-      block0[3] = block0[3]            | md5apr1_magic0 << 24;
-      block1[0] = md5apr1_magic0 >>  8 | md5apr1_magic1 << 24;
-      block1[1] = md5apr1_magic1 >>  8;
+      block0[3] = block0[3]             | md5apr1_magic0 << 24u;
+      block1[0] = md5apr1_magic0 >>  8u | md5apr1_magic1 << 24u;
+      block1[1] = md5apr1_magic1 >>  8u;
       break;
   }
 }