3 files changed, 13 insertions, 7 deletions
diff --git a/src/utils/base64.cpp b/src/utils/base64.cpp
index bd20496b3..57bc68a7c 100644
--- a/src/utils/base64.cpp
+++ b/src/utils/base64.cpp
@@ -180,7 +180,8 @@ std::string encodeBase64String(std::string value)
     int sz = 0;
     const unsigned char *const str = reinterpret_cast<unsigned char*>(
         const_cast<char*>(value.c_str()));
-    unsigned char *const buf = php3_base64_encode(str, value.size(), &sz);
+    unsigned char *const buf = php3_base64_encode(
+        str, static_cast<int>(value.size()), &sz);
     if (!buf)
         return std::string();
 
@@ -194,7 +195,8 @@ std::string decodeBase64String(std::string value)
     int sz = 0;
     const unsigned char *const str = reinterpret_cast<unsigned char*>(
         const_cast<char*>(value.c_str()));
-    unsigned char *const buf = php3_base64_decode(str, value.size(), &sz);
+    unsigned char *const buf = php3_base64_decode(
+        str, static_cast<int>(value.size()), &sz);
 
     if (buf)
         value = std::string(reinterpret_cast<char*>(buf), sz);
diff --git a/src/utils/physfsrwops.cpp b/src/utils/physfsrwops.cpp
index 0faab8f20..94172cd71 100644
--- a/src/utils/physfsrwops.cpp
+++ b/src/utils/physfsrwops.cpp
@@ -121,7 +121,9 @@ static PHYSFSSIZE physfsrwops_read(SDL_RWops *const rw, void *ptr,
 {
     PHYSFS_file *const handle = static_cast<PHYSFS_file *const>(
         rw->hidden.unknown.data1);
-    const PHYSFS_sint64 rc = PHYSFS_read(handle, ptr, size, maxnum);
+    const PHYSFS_sint64 rc = PHYSFS_read(handle, ptr,
+        static_cast<unsigned int>(size),
+        static_cast<unsigned int>(maxnum));
     if (rc != static_cast<PHYSFS_sint64>(maxnum))
     {
         if (!PHYSFS_eof(handle)) /* not EOF? Must be an error. */
@@ -137,7 +139,9 @@ static PHYSFSSIZE physfsrwops_write(SDL_RWops *const rw, const void *ptr,
 {
     PHYSFS_file *const handle = static_cast<PHYSFS_file *const>(
         rw->hidden.unknown.data1);
-    const PHYSFS_sint64 rc = PHYSFS_write(handle, ptr, size, num);
+    const PHYSFS_sint64 rc = PHYSFS_write(handle, ptr,
+        static_cast<unsigned int>(size),
+        static_cast<unsigned int>(num));
     if (rc != static_cast<PHYSFS_sint64>(num))
         SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError());
 
diff --git a/src/utils/xml.cpp b/src/utils/xml.cpp
index 94fc18f98..3d98fda61 100644
--- a/src/utils/xml.cpp
+++ b/src/utils/xml.cpp
@@ -46,10 +46,10 @@ static void xmlErrorLogger(void *ctx A_UNUSED, const char *msg A_UNUSED, ...)
 
 static void xmlErrorLogger(void *ctx A_UNUSED, const char *msg, ...)
 {
-    unsigned size = 1024;
-    const unsigned msgSize = strlen(msg);
+    size_t size = 1024;
+    const size_t msgSize = strlen(msg);
     if (msgSize * 3 > size)
-        size = static_cast<unsigned>(msgSize * 3);
+        size = msgSize * 3;
 
     char* buf = new char[size + 1];
     va_list ap;