diff --git a/panda/src/rocket/Sources.pp b/panda/src/rocket/Sources.pp
index 2d90ee0e89..5ee7d4ea51 100644
--- a/panda/src/rocket/Sources.pp
+++ b/panda/src/rocket/Sources.pp
@@ -11,7 +11,7 @@
   #define LOCAL_LIBS \
     p3display p3pgraph p3gobj p3linmath p3putil p3dgraph
 
-  #define COMBINED_SOURCES rocket_composite1.cxx
+  #define COMBINED_SOURCES p3rocket_composite1.cxx
 
   #define SOURCES \
     config_rocket.h \
diff --git a/panda/src/rocket/rocket_composite1.cxx b/panda/src/rocket/p3rocket_composite1.cxx
similarity index 100%
rename from panda/src/rocket/rocket_composite1.cxx
rename to panda/src/rocket/p3rocket_composite1.cxx