diff -Naur a/acinclude.m4 b/acinclude.m4
--- a/acinclude.m4	2004-04-10 05:55:37.000000000 +0200
+++ b/acinclude.m4	2019-08-20 22:11:45.270355252 +0200
@@ -59,6 +59,12 @@
         break
     fi
 
+    if test -f "$f/lib64/libmysqlclient.so"
+    then
+        MYSQL_LIB_DIR="$f/lib64"
+        break
+    fi
+
     if test -f "$f/lib/mysql/libmysqlclient.so"
     then
         MYSQL_LIB_DIR="$f/lib/mysql"
@@ -73,6 +79,12 @@
         break
     fi
 
+    if test -f "$f/lib64/libmysqlclient.a"
+    then
+        MYSQL_LIB_DIR="$f/lib64"
+        break
+    fi
+
     if test -f "$f/lib/mysql/libmysqlclient.a"
     then
         MYSQL_LIB_DIR="$f/lib/mysql"