diff --git a/libs/gfx/source/pixel.cpp b/libs/gfx/source/pixel.cpp
index 24f8c195..39d01206 100644
--- a/libs/gfx/source/pixel.cpp
+++ b/libs/gfx/source/pixel.cpp
@@ -1,6 +1,8 @@
 #include <psemek/gfx/pixel.hpp>
 #include <psemek/util/to_string.hpp>
 
+#include <psemek/log/log.hpp>
+
 namespace psemek::gfx
 {
 
@@ -70,7 +72,8 @@ namespace psemek::gfx
 			case gl::COMPRESSED_SIGNED_RED_RGTC1: return 1;
 		};
 
-		throw std::runtime_error(util::to_string("unknown pixel format: 0x", std::hex, internal_format));
+		log::warning() << "Unknown pixel format: 0x" << std::hex << internal_format;
+		return 0;
 	}
 
 }