diff --git a/dlls/cabinet/cabinet.h b/dlls/cabinet/cabinet.h
index 8b38f9b587c..3423a73de7f 100644
--- a/dlls/cabinet/cabinet.h
+++ b/dlls/cabinet/cabinet.h
@@ -654,7 +654,6 @@ typedef struct {
 } SESSION;
 
 /* from fdi.c */
-void QTMupdatemodel(struct QTMmodel *model, int sym);
 int make_decode_table(cab_ULONG nsyms, cab_ULONG nbits, const cab_UBYTE *length, cab_UWORD *table);
 
 #endif /* __WINE_CABINET_H */
diff --git a/dlls/cabinet/fdi.c b/dlls/cabinet/fdi.c
index e36066df5bc..bdf64b6df5b 100644
--- a/dlls/cabinet/fdi.c
+++ b/dlls/cabinet/fdi.c
@@ -151,7 +151,7 @@ typedef struct fdi_cds_fwd {
 /****************************************************************
  * QTMupdatemodel (internal)
  */
-void QTMupdatemodel(struct QTMmodel *model, int sym) {
+static void QTMupdatemodel(struct QTMmodel *model, int sym) {
   struct QTMmodelsym temp;
   int i, j;