diff --git a/src/pyinterp.cc b/src/pyinterp.cc
index d1f46580..8d9c8c84 100644
--- a/src/pyinterp.cc
+++ b/src/pyinterp.cc
@@ -535,7 +535,9 @@ namespace {
     case value_t::ANY:          // a pointer to an arbitrary object
       return object(val);
     }
+#if !defined(__clang__)
     return object();
+#endif
   }
 }
 
diff --git a/src/query.h b/src/query.h
index 7286e89b..c694d099 100644
--- a/src/query.h
+++ b/src/query.h
@@ -186,7 +186,9 @@ public:
           assert(false);
           return "<UNKNOWN>";
         }
+#if !defined(__clang__)
         return "<ERROR>";
+#endif
       }
 
       void unexpected();
diff --git a/src/times.h b/src/times.h
index edc6d8b8..e3134665 100644
--- a/src/times.h
+++ b/src/times.h
@@ -218,7 +218,9 @@ struct date_duration_t
     case YEARS:
       return date + gregorian::years(length);
     }
+#if !defined(__clang__)
     return date_t();
+#endif
   }
 
   date_t subtract(const date_t& date) const {
@@ -234,7 +236,9 @@ struct date_duration_t
     case YEARS:
       return date - gregorian::years(length);
     }
+#if !defined(__clang__)
     return date_t();
+#endif
   }
 
   string to_string() const {