diff --git a/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp b/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp
index 3df8c32bd..a5ac881ad 100644
--- a/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp
+++ b/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp
@@ -200,7 +200,7 @@ IESLoadHelper::load(const std::string& data, IESFileInfo& info)
 		info._anglesH.push_back(value);
 	}
 
-	info._candalaValues.reserve(info.anglesNumH * info.anglesNumV);
+	info._candalaValues.reserve(size_t(info.anglesNumH * info.anglesNumV));
 
 	for (std::int32_t y = 0; y < info.anglesNumH; ++y)
 	{