diff --git a/code/nel/src/gui/interface_anim.cpp b/code/nel/src/gui/interface_anim.cpp
index f18f9633d..edd96e1cf 100644
--- a/code/nel/src/gui/interface_anim.cpp
+++ b/code/nel/src/gui/interface_anim.cpp
@@ -194,7 +194,7 @@ namespace NLGUI
 				fromString((const char*)time, fAnimTime);
 				TAnimationTime animTime = fAnimTime * CWidgetManager::getInstance()->getSystemOption(CWidgetManager::OptionMulCoefAnim).getValFloat();
 				double animValue;
-				fromString(value, animValue);
+				fromString(value.str(), animValue);
 
 				// Depending on the type of the track add the key
 				switch(_Type)
diff --git a/code/nel/src/gui/interface_parser.cpp b/code/nel/src/gui/interface_parser.cpp
index f8725c086..1dbf62d51 100644
--- a/code/nel/src/gui/interface_parser.cpp
+++ b/code/nel/src/gui/interface_parser.cpp
@@ -796,7 +796,7 @@ namespace NLGUI
 			return false;
 		}
 		sint32 size;
-		fromString(cSize, size);
+		fromString(cSize.str(), size);
 		if (size <= 0)
 		{
 			// todo hulud interface syntax error