diff --git a/man.changes b/man.changes
index 47e09ae..9892011 100644
--- a/man.changes
+++ b/man.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Aug 27 07:38:06 UTC 2020 - Dr. Werner Fink <werner@suse.de>
+
+- Set libexecdir at build time for wrapper (boo#1175813)
+- Do the same in mandb.service
+
 -------------------------------------------------------------------
 Mon Jun 15 07:49:33 UTC 2020 - Dr. Werner Fink <werner@suse.de>
 
diff --git a/man.spec b/man.spec
index 6f3e903..03c90af 100644
--- a/man.spec
+++ b/man.spec
@@ -185,7 +185,7 @@ printer (using groff).
     done
     patch --backup --suffix=.s10 ${FUZZ+"--fuzz=$FUZZ"} -p0 < %{SOURCE10}
     gcc $CFLAGS -I gl/lib/ -I include/ --include config.h -D LOCALEDIR="\"%{_datarootdir}/locale\"" \
-	-o wrapper %{SOURCE5} -L gl/lib/.libs/ -lgnu
+	-D  LIBEXECDIR="\"%{_libexecdir}\"" -o wrapper %{SOURCE5} -L gl/lib/.libs/ -lgnu
 
 %check
 if ! make check; then
@@ -263,6 +263,7 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %if 0%{?suse_version} >= 1500
     install -m 0644 %{SOURCE8} %{buildroot}%{_unitdir}/
     install -m 0644 %{SOURCE9} %{buildroot}%{_unitdir}/
+    sed -ri 's|@@LIBEXECDIR@@|%{_libexecdir}|' %{buildroot}%{_unitdir}/mandb.service
 %endif
 %endif
 
diff --git a/mandb.service b/mandb.service
index ab00eb2..a723b0f 100644
--- a/mandb.service
+++ b/mandb.service
@@ -9,4 +9,4 @@ Group=man
 Type=oneshot
 Nice=5
 IOSchedulingClass=idle
-ExecStart=/usr/lib/man-db/do_mandb
+ExecStart=@@LIBEXECDIR@@/man-db/do_mandb
diff --git a/wrapper.c b/wrapper.c
index a617ae4..1736265 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -44,6 +44,9 @@
 
 #include "manconfig.h"
 
+#ifndef LIBEXECDIR
+# define LIBEXECDIR "/usr/lib"
+#endif
 
 /* this list is used to authenticate the program running.
  * it is fixed at compile time to avoid a full class of 
@@ -59,8 +62,8 @@ static struct {
   { "_man",	"src/man",	"man"	},
   { "_mandb",	"src/mandb",	"man"	},
 #endif
-  { "man",	"/usr/lib/man-db/man",		"man"	},
-  { "mandb",	"/usr/lib/man-db/mandb",	"man"	},
+  { "man",	LIBEXECDIR "/man-db/man",		"man"	},
+  { "mandb",	LIBEXECDIR "/man-db/mandb",	"man"	},
   { 0,		0,				0,	}};
 
 char *program_name;