diff --git a/src/core/enum_type.hpp b/src/core/enum_type.hpp
index 6d4e36f5a3..35c40978ab 100644
--- a/src/core/enum_type.hpp
+++ b/src/core/enum_type.hpp
@@ -246,16 +246,12 @@ public:
 template <typename Container, typename Index>
 class EnumClassIndexContainer : public Container {
 public:
-	Container::reference at(size_t pos) { return this->Container::at(pos); }
 	Container::reference at(const Index &pos) { return this->Container::at(to_underlying(pos)); }
 
-	Container::const_reference at(size_t pos) const { return this->Container::at(pos); }
 	Container::const_reference at(const Index &pos) const { return this->Container::at(to_underlying(pos)); }
 
-	Container::reference operator[](size_t pos) { return this->Container::operator[](pos); }
 	Container::reference operator[](const Index &pos) { return this->Container::operator[](to_underlying(pos)); }
 
-	Container::const_reference operator[](size_t pos) const { return this->Container::operator[](pos); }
 	Container::const_reference operator[](const Index &pos) const { return this->Container::operator[](to_underlying(pos)); }
 };
 
diff --git a/src/newgrf/newgrf_act0_globalvar.cpp b/src/newgrf/newgrf_act0_globalvar.cpp
index 7d32a1a794..2d80f27b18 100644
--- a/src/newgrf/newgrf_act0_globalvar.cpp
+++ b/src/newgrf/newgrf_act0_globalvar.cpp
@@ -138,7 +138,7 @@ static ChangeInfoResult GlobalVarChangeInfo(uint first, uint last, int prop, Byt
 				int factor = buf.ReadByte();
 
 				if (id < to_underlying(Price::End)) {
-					_cur_gps.grffile->price_base_multipliers[id] = std::min<int>(factor - 8, MAX_PRICE_MODIFIER);
+					_cur_gps.grffile->price_base_multipliers[static_cast<Price>(id)] = std::min<int>(factor - 8, MAX_PRICE_MODIFIER);
 				} else {
 					GrfMsg(1, "GlobalVarChangeInfo: Price {} out of range, ignoring", id);
 				}