diff --git a/guid.cpp b/guid.cpp
index b0f862a3..9964f286 100644
--- a/guid.cpp
+++ b/guid.cpp
@@ -83,10 +83,8 @@ guid::from_bytes (const uint8_t *bytes) {
     g.data3 = *reinterpret_cast<const uint16_t *> (bytes);
     bytes += sizeof (g.data3);
 
-    for (signed i = 7; i >= 0; --i) {
-        g.data4[i] = *reinterpret_cast<const uint8_t *> (bytes);
-        ++bytes;
-    }
+    for (signed i = 7; i >= 0; --i)
+        g.data4[i] = *bytes++;
 
     return g;
 }
@@ -100,7 +98,7 @@ guid::from_string (const char *bytes)
 guid::type
 guid::get_type (void) const {
     // Top three bits signal the type
-    unsigned bits = (unsigned)data4[2] >> 5U;
+    unsigned bits = data4[2] >> 5U;
 
     switch (bits) {
         case 0x0:
diff --git a/image.cpp b/image.cpp
index d6401807..214806d8 100644
--- a/image.cpp
+++ b/image.cpp
@@ -53,7 +53,7 @@ write_netpbm (const uint8_t *restrict pixels,
     // Write the data rows
     for (size_t y = 0; y < height; ++y) {
         for (size_t x = 0; x < width; ++x)
-            output << (uint8_t)pixels[y * stride + x];
+            output << pixels[y * stride + x];
     }
 }
 
diff --git a/time.cpp b/time.cpp
index 899659e7..09b8bb45 100644
--- a/time.cpp
+++ b/time.cpp
@@ -114,7 +114,7 @@ util::period_query::poll (void) {
 // ----------------------------------------------------------------------------
 util::rate_limiter::rate_limiter (unsigned rate):
     m_last (nanoseconds ()),
-    m_target (static_cast<double> (SECOND) / rate)
+    m_target (SECOND / rate)
 { ; }