diff --git a/src/newgrf_config.cpp b/src/newgrf_config.cpp
--- a/src/newgrf_config.cpp
+++ b/src/newgrf_config.cpp
@@ -260,7 +260,7 @@ void GRFParameterInfo::SetValue(struct G
 	} else {
 		SB(config->param[this->param_nr], this->first_bit, this->num_bit, value);
 	}
-	config->num_params = max<uint>(config->num_params, this->param_nr + 1);
+	config->num_params = std::max<uint>(config->num_params, this->param_nr + 1);
 	SetWindowDirty(WC_GAME_OPTIONS, WN_GAME_OPTIONS_NEWGRF_STATE);
 }
 
@@ -339,7 +339,7 @@ static bool CalcGRFMD5Sum(GRFConfig *con
 	if (f == nullptr) return false;
 
 	long start = ftell(f);
-	size = min(size, GRFGetSizeOfDataSection(f));
+	size = std::min(size, GRFGetSizeOfDataSection(f));
 
 	if (start < 0 || fseek(f, start, SEEK_SET) < 0) {
 		FioFCloseFile(f);