diff --git a/src/r_data/models/models.cpp b/src/r_data/models/models.cpp
index 2ab8d635d..96a0551fa 100644
--- a/src/r_data/models/models.cpp
+++ b/src/r_data/models/models.cpp
@@ -474,7 +474,7 @@ static unsigned FindModel(const char * path, const char * modelfile)
 //
 //===========================================================================
 
-void ParseModelDefLump(int Lump);
+static void ParseModelDefLump(int Lump);
 
 void InitModels()
 {