diff --git a/src/apps/bin/tar/src/Jamfile b/src/apps/bin/tar/src/Jamfile
index 02c451bba2..e7e541969c 100644
--- a/src/apps/bin/tar/src/Jamfile
+++ b/src/apps/bin/tar/src/Jamfile
@@ -5,7 +5,7 @@ SubDirHdrs [ FDirName $(SUBDIR) $(DOTDOT) ] ;
 
 # set some additional defines
 {
-	SubDirCcFlags -DHAVE_CONFIG_H ;
+	SubDirCcFlags -DHAVE_CONFIG_H -w ;
 }
 
 local tar_rsrc = [ FGristFiles tar.rsrc ] ;
diff --git a/src/libs/pdflib/libs/pdcore/Jamfile b/src/libs/pdflib/libs/pdcore/Jamfile
index fcca5e7f59..cfd94a834a 100644
--- a/src/libs/pdflib/libs/pdcore/Jamfile
+++ b/src/libs/pdflib/libs/pdcore/Jamfile
@@ -4,6 +4,8 @@ UseLibraryHeaders pdflib ;
 
 SubDirHdrs [ FDirName $(OBOS_TOP) src libs pdflib libs flate ] ;
 
+SubDirCcFlags -w ;
+
 StaticLibrary pdf : 
 	pc_arc4.c
 	pc_core.c
diff --git a/src/libs/pdflib/libs/pdflib/Jamfile b/src/libs/pdflib/libs/pdflib/Jamfile
index eab3ce7ad9..8254ee099d 100644
--- a/src/libs/pdflib/libs/pdflib/Jamfile
+++ b/src/libs/pdflib/libs/pdflib/Jamfile
@@ -5,6 +5,8 @@ SubDirHdrs [ FDirName $(OBOS_TOP) src libs pdflib libs flate ] ;
 SubDirHdrs [ FDirName $(OBOS_TOP) src libs pdflib libs png ] ;
 SubDirHdrs [ FDirName $(OBOS_TOP) src libs pdflib libs tiff ] ;
 
+SubDirCcFlags -w ;
+
 UseLibraryHeaders pdflib ;
 
 StaticLibrary pdf :