diff --git a/dkms.in b/dkms.in
index bca479d7..a840e7d1 100644
--- a/dkms.in
+++ b/dkms.in
@@ -1280,10 +1280,20 @@ prepare_mok()
                 fi
 
                 if [[ ! $mok_signing_key && -f ${kernel_config} ]]; then
+                    # Switch to the kernel's source directory while resolving
+                    # the module signing key, since the path set within the config
+                    # could be relative to the source directory
+                    local _pwd=$(pwd)
+                    cd $kernel_source_dir
+
                     mok_signing_key=$(grep "^CONFIG_MODULE_SIG_KEY=" "${kernel_config}" | cut -f2 -d= | sed 's/"//g')
+                    # Assume the absolute path to the certificate
+                    mok_signing_key=$(readlink -f "${mok_signing_key}")
                     # Kernel module signing facility requires PEM files containing both
                     # the key and the certificate, so in this case both will be the same.
                     mok_certificate=${mok_signing_key}
+
+                    cd $_pwd
                 fi
                 ;;
         esac