diff --git a/squashfs.changes b/squashfs.changes
index c4236ba..9146fd3 100644
--- a/squashfs.changes
+++ b/squashfs.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Mar 20 15:51:14 UTC 2019 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Use / as sed command delimiter. Comma can actually show up in
+  optflags (think -Wl,…), which then breaks the sed command line
+  parsing.
+
 -------------------------------------------------------------------
 Wed Aug  1 14:36:31 UTC 2018 - schwab@suse.de
 
diff --git a/squashfs.spec b/squashfs.spec
index acfcc1e..cb0ba84 100644
--- a/squashfs.spec
+++ b/squashfs.spec
@@ -54,7 +54,7 @@ squashfs images.
 %patch4 -p1
 
 %build
-sed -i -e "s,-O2,%{optflags}," squashfs-tools/Makefile
+sed -i -e "s/-O2/%{optflags}/" squashfs-tools/Makefile
 make %{?_smp_mflags} -C squashfs-tools XZ_SUPPORT=1 LZO_SUPPORT=1 \
 %if %{?suse_version} > 1315
    LZ4_SUPPORT=1