2 files changed, 2 insertions, 2 deletions

diff --git a/tools/buildzip.pl b/tools/buildzip.pl
index 12348c61d5..9211126687 100755
--- a/tools/buildzip.pl
+++ b/tools/buildzip.pl
@@ -47,7 +47,7 @@ sub find_copyfile {
 
 $ROOT="..";
 
-my $ziptool="zip -r";
+my $ziptool="zip -r9";
 my $output="rockbox.zip";
 my $verbose;
 my $exe;
diff --git a/tools/configure b/tools/configure
index e709bff62d..745428730d 100755
--- a/tools/configure
+++ b/tools/configure
@@ -2340,7 +2340,7 @@ fullzip:
 
 7zip:
         \$(SILENT)for f in \`cat \$(BUILDDIR)/@APPS@/features\`; do feat="\$\$feat:\$\$f" ; done; \\
-        \$(TOOLSDIR)/buildzip.pl \$(VERBOSEOPT) -t \"\$(MODELNAME)\$\$feat\" -i \"\$(TARGET_ID)\"  -o "rockbox.7z" -z "7za a" -r "\$(ROOTDIR)" \$(TARGET) \$(BINARY)
+        \$(TOOLSDIR)/buildzip.pl \$(VERBOSEOPT) -t \"\$(MODELNAME)\$\$feat\" -i \"\$(TARGET_ID)\"  -o "rockbox.7z" -z "7za a -mx=9" -r "\$(ROOTDIR)" \$(TARGET) \$(BINARY)
 
 tar:
         \$(SILENT)rm -f rockbox.tar