diff --git a/shells/ksh93/patches/patch-src_cmd_ksh93_Mamfile b/shells/ksh93/patches/patch-src_cmd_ksh93_Mamfile
new file mode 100644
index 00000000000..1e9d9ad469b
--- /dev/null
+++ b/shells/ksh93/patches/patch-src_cmd_ksh93_Mamfile
@@ -0,0 +1,23 @@
+$OpenBSD: patch-src_cmd_ksh93_Mamfile,v 1.1 2018/05/01 08:37:50 pascal Exp $
+
+Index: src/cmd/ksh93/Mamfile
+--- src/cmd/ksh93/Mamfile.orig
++++ src/cmd/ksh93/Mamfile
+@@ -1337,7 +1337,7 @@ prev +ljobs
+ prev +li
+ prev ${mam_libsocket}
+ prev ${mam_libsecdb}
+-exec - ${CC} ${CCLDFLAGS} ${mam_cc_FLAGS} ${CCFLAGS} ${LDFLAGS} ${mam_cc_L+-L.} ${mam_cc_L+-L${INSTALLROOT}/lib} -o ksh pmain.o ${mam_libshell} ${mam_libnsl} ${mam_libast}
++exec - ${CC} ${CCLDFLAGS} ${mam_cc_FLAGS} ${CCFLAGS} ${LDFLAGS} ${mam_cc_L+-L.} ${mam_cc_L+-L${INSTALLROOT}/lib} -o ksh pmain.o ${mam_libshell} ${mam_libnsl} ${mam_libast} -lm
+ done ksh generated
+ make shcomp
+ make shcomp.o
+@@ -1361,7 +1361,7 @@ prev ${mam_libsocket}
+ prev ${mam_libsecdb}
+ setv CC.DLL -UCC.DLL
+ setv SH_DICT -DSH_DICT="\"libshell\""
+-exec - ${CC} ${CCLDFLAGS} ${mam_cc_FLAGS} ${CCFLAGS} ${LDFLAGS} ${mam_cc_L+-L.} ${mam_cc_L+-L${INSTALLROOT}/lib} -o shcomp shcomp.o ${mam_libshell} ${mam_libnsl} ${mam_libast}
++exec - ${CC} ${CCLDFLAGS} ${mam_cc_FLAGS} ${CCFLAGS} ${LDFLAGS} ${mam_cc_L+-L.} ${mam_cc_L+-L${INSTALLROOT}/lib} -o shcomp shcomp.o ${mam_libshell} ${mam_libnsl} ${mam_libast} -lm
+ done shcomp generated
+ make suid_exec
+ make suid_exec.o