diff --git a/applypatch/utils.c b/applypatch/utils.c
index 912229b..41ff676 100644
--- a/applypatch/utils.c
+++ b/applypatch/utils.c
@@ -38,25 +38,28 @@
   fputc((value >> 56) & 0xff, f);
 }
 
-int Read2(unsigned char* p) {
-  return (int)(((unsigned int)p[1] << 8) |
-               (unsigned int)p[0]);
+int Read2(void* pv) {
+    unsigned char* p = pv;
+    return (int)(((unsigned int)p[1] << 8) |
+                 (unsigned int)p[0]);
 }
 
-int Read4(unsigned char* p) {
-  return (int)(((unsigned int)p[3] << 24) |
-               ((unsigned int)p[2] << 16) |
-               ((unsigned int)p[1] << 8) |
-               (unsigned int)p[0]);
+int Read4(void* pv) {
+    unsigned char* p = pv;
+    return (int)(((unsigned int)p[3] << 24) |
+                 ((unsigned int)p[2] << 16) |
+                 ((unsigned int)p[1] << 8) |
+                 (unsigned int)p[0]);
 }
 
-long long Read8(unsigned char* p) {
-  return (long long)(((unsigned long long)p[7] << 56) |
-                     ((unsigned long long)p[6] << 48) |
-                     ((unsigned long long)p[5] << 40) |
-                     ((unsigned long long)p[4] << 32) |
-                     ((unsigned long long)p[3] << 24) |
-                     ((unsigned long long)p[2] << 16) |
-                     ((unsigned long long)p[1] << 8) |
-                     (unsigned long long)p[0]);
+long long Read8(void* pv) {
+    unsigned char* p = pv;
+    return (long long)(((unsigned long long)p[7] << 56) |
+                       ((unsigned long long)p[6] << 48) |
+                       ((unsigned long long)p[5] << 40) |
+                       ((unsigned long long)p[4] << 32) |
+                       ((unsigned long long)p[3] << 24) |
+                       ((unsigned long long)p[2] << 16) |
+                       ((unsigned long long)p[1] << 8) |
+                       (unsigned long long)p[0]);
 }