diff --git a/common/bspfile.cc b/common/bspfile.cc
index 72ce3212..7d385c91 100644
--- a/common/bspfile.cc
+++ b/common/bspfile.cc
@@ -183,12 +183,12 @@ public:
         return !string_iequals(name, "hint");
     }
 
-    constexpr contentflags_t create_sky_contents() const
+    contentflags_t create_sky_contents() const
     {
         return {CONTENTS_SKY};
     }
 
-    constexpr contentflags_t create_liquid_contents(const int32_t &liquid_type) const
+    contentflags_t create_liquid_contents(const int32_t &liquid_type) const
     {
         return {liquid_type};
     }