diff --git a/libtomcrypt.changes b/libtomcrypt.changes
index 741f13f..01181ab 100644
--- a/libtomcrypt.changes
+++ b/libtomcrypt.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Jul 26 19:40:32 UTC 2018 - jengelh@inai.de
+
+- Fix RPM groups.
+- Don't pipe find, use the safer -exec.
+
 -------------------------------------------------------------------
 Thu Jul 12 12:41:50 UTC 2018 - meissner@suse.com
 
diff --git a/libtomcrypt.spec b/libtomcrypt.spec
index ba3b9e9..c794cfe 100644
--- a/libtomcrypt.spec
+++ b/libtomcrypt.spec
@@ -23,7 +23,7 @@ Version:        1.18.2
 Release:        0
 Summary:        Cryptographic Toolkit Written in Portable C
 License:        SUSE-Public-Domain
-Group:          System/Libraries
+Group:          Development/Libraries/C and C++
 Url:            http://libtom.org
 Source0:        https://github.com/libtom/libtomcrypt/releases/download/v%{version}/crypt-%{version}.tar.xz
 Source1:        https://github.com/libtom/libtomcrypt/releases/download/v%{version}/crypt-%{version}.tar.xz.asc
@@ -68,7 +68,7 @@ This package contains headers and other development files.
 
 %package examples
 Summary:        Example Files for LibTomCrypt
-Group:          Development/Libraries/Other
+Group:          Documentation/Other
 Requires:       %{name}-devel = %{version}
 
 %description examples
@@ -84,7 +84,7 @@ This package contains example *.c files showing how to use TomCrypt library.
 modified="$(sed -n '/^----/n;s/ - .*$//;p;q' "%{SOURCE3}")"
 DATE="\"$(date -d "${modified}" "+%%b %%e %%Y")\""
 TIME="\"$(date -d "${modified}" "+%%R")\""
-find .  -name '*.[ch]' | xargs sed -i "s/__DATE__/${DATE}/g;s/__TIME__/${TIME}/g"
+find . -name '*.[ch]' -exec sed -i "s/__DATE__/${DATE}/g;s/__TIME__/${TIME}/g" "{}" "+"
 
 %build
 export CFLAGS="%{optflags} -DLTM_DESC -DUSE_LTM"