diff --git a/opal/util/arch.c b/opal/util/arch.c
index cf35b19c24..8c18ed5305 100644
--- a/opal/util/arch.c
+++ b/opal/util/arch.c
@@ -67,7 +67,7 @@ static inline int32_t opal_arch_ldisintel( void )
             j = j-1;
         }
     }
-    return (pui[j] & (1 << i) ? 1 : 0);
+    return ((pui[j] & (1u << i)) ? 1 : 0);
 }
 
 static inline void opal_arch_setmask ( uint32_t *var, uint32_t mask)
diff --git a/opal/util/net.c b/opal/util/net.c
index 3f14d524b8..04d69b4067 100644
--- a/opal/util/net.c
+++ b/opal/util/net.c
@@ -202,7 +202,7 @@ opal_net_init(void)
 uint32_t
 opal_net_prefix2netmask(uint32_t prefixlen)
 {
-    return htonl (((1 << prefixlen) - 1) << (32 - prefixlen));
+    return htonl (((1u << prefixlen) - 1u) << (32 - prefixlen));
 }