diff --git a/lib/wsprcode/nhash.c b/lib/wsprcode/nhash.c
index 675022b41..8aabb4ff2 100644
--- a/lib/wsprcode/nhash.c
+++ b/lib/wsprcode/nhash.c
@@ -360,17 +360,17 @@ uint32_t nhash_( const void *key, int *length0, uint32_t *initval0)
     /*-------------------------------- last block: affect all 32 bits of (c) */
     switch(length)                   /* all the case statements fall through */
     {
-    case 12: c+=((uint32_t)k[11])<<24;
-    case 11: c+=((uint32_t)k[10])<<16;
-    case 10: c+=((uint32_t)k[9])<<8;
-    case 9 : c+=k[8];
-    case 8 : b+=((uint32_t)k[7])<<24;
-    case 7 : b+=((uint32_t)k[6])<<16;
-    case 6 : b+=((uint32_t)k[5])<<8;
-    case 5 : b+=k[4];
-    case 4 : a+=((uint32_t)k[3])<<24;
-    case 3 : a+=((uint32_t)k[2])<<16;
-    case 2 : a+=((uint32_t)k[1])<<8;
+    case 12: c+=((uint32_t)k[11])<<24; /* fall through */
+    case 11: c+=((uint32_t)k[10])<<16; /* fall through */
+    case 10: c+=((uint32_t)k[9])<<8;   /* fall through */
+    case 9 : c+=k[8];                  /* fall through */
+    case 8 : b+=((uint32_t)k[7])<<24;  /* fall through */
+    case 7 : b+=((uint32_t)k[6])<<16;  /* fall through */
+    case 6 : b+=((uint32_t)k[5])<<8;   /* fall through */
+    case 5 : b+=k[4];                  /* fall through */
+    case 4 : a+=((uint32_t)k[3])<<24;  /* fall through */
+    case 3 : a+=((uint32_t)k[2])<<16;  /* fall through */
+    case 2 : a+=((uint32_t)k[1])<<8;   /* fall through */
     case 1 : a+=k[0];
              break;
     case 0 : return c;