diff --git a/kernel-lts-tfg.spec b/kernel-lts-tfg.spec
index 805ab98..61a899e 100644
--- a/kernel-lts-tfg.spec
+++ b/kernel-lts-tfg.spec
@@ -10,7 +10,6 @@ BuildRequires: gnupg2
 
 Source0: https://cdn.kernel.org/pub/linux/kernel/v%{major_ver}.x/linux-%{version}.tar.gz
 Source1: master.inc
-Source99: https://cdn.kernel.org/pub/linux/kernel/v%{major_ver}.x/linux-%{version}.tar.sign
 
 %global src_dir linux-%{version}
 %include %{SOURCE1}
diff --git a/kernel-stable-tfg.spec b/kernel-stable-tfg.spec
index 31a2187..c2a5e17 100644
--- a/kernel-stable-tfg.spec
+++ b/kernel-stable-tfg.spec
@@ -10,7 +10,6 @@ BuildRequires: gnupg2
 
 Source0: https://cdn.kernel.org/pub/linux/kernel/v%{major_ver}.x/linux-%{version}.tar.gz
 Source1: master.inc
-Source99: https://cdn.kernel.org/pub/linux/kernel/v%{major_ver}.x/linux-%{version}.tar.sign
 
 %global src_dir linux-%{version}
 %include %{SOURCE1}
diff --git a/master.inc b/master.inc
index 3175170..e7932db 100644
--- a/master.inc
+++ b/master.inc
@@ -59,15 +59,6 @@ This package provides kernel headers and makefiles sufficient to build modules
 against the kernel package.
 
 %prep
-if [ -f ../SOURCES/linux-%{version}.tar.sign ]; then
-    [ -f ../SOURCES/linux-%{version}.tar ] || gzip --decompress --keep %{SOURCE0}
-    gpg2 --locate-keys torvalds@kernel.org gregkh@kernel.org
-    gpg2 --verify %{SOURCE99} || exit 1
-
-    # not needed anymore, might as well delete it to make space for the
-    # build and install phases
-    rm -vf linux-%{version}.tar
-fi
 %setup -q -n %{src_dir}
 find ../../SOURCES -type f -name "patch-*.patch" -print0 | sort -z | xargs --no-run-if-empty -t -0 -n 1 patch -p1 -i