diff --git a/.travis.yml b/.travis.yml
index e0547ac4..359ff732 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -89,7 +89,7 @@ script:
         mkdir cryptopp-build
         cd cryptopp-build
         cmake $CRYPTOPP_DIR
-		make -j 4
+        make -j 4
         ./cryptest.exe v
         ./cryptest.exe tv all
     else
diff --git a/GNUmakefile b/GNUmakefile
old mode 100755
new mode 100644