diff --git a/gnoemoe/mcp/Makefile.include b/gnoemoe/mcp/Makefile.include
index 37f0c50..836867c 100644
--- a/gnoemoe/mcp/Makefile.include
+++ b/gnoemoe/mcp/Makefile.include
@@ -2,6 +2,7 @@
 mcpdir = mcp
 
 gnoemoe_SOURCES += \
+		$(mcpdir)/gm-mcp-classes.c $(mcpdir)/gm-mcp-classes.h \
 		$(mcpdir)/gm-mcp.c $(mcpdir)/gm-mcp.h \
 		$(mcpdir)/gm-mcp-session.c $(mcpdir)/gm-mcp-session.h \
 		$(mcpdir)/gm-mcp-package.c $(mcpdir)/gm-mcp-package.h \