diff --git a/passes/opt/Makefile.inc b/passes/opt/Makefile.inc
index 337fee9e4..ea3646330 100644
--- a/passes/opt/Makefile.inc
+++ b/passes/opt/Makefile.inc
@@ -14,5 +14,6 @@ OBJS += passes/opt/opt_demorgan.o
 OBJS += passes/opt/rmports.o
 OBJS += passes/opt/opt_lut.o
 OBJS += passes/opt/pmux2shiftx.o
+OBJS += passes/opt/muxpack.o
 endif
 
diff --git a/passes/techmap/muxpack.cc b/passes/opt/muxpack.cc
similarity index 100%
rename from passes/techmap/muxpack.cc
rename to passes/opt/muxpack.cc
diff --git a/passes/techmap/Makefile.inc b/passes/techmap/Makefile.inc
index 561636080..cf9e198ad 100644
--- a/passes/techmap/Makefile.inc
+++ b/passes/techmap/Makefile.inc
@@ -37,7 +37,6 @@ OBJS += passes/techmap/attrmap.o
 OBJS += passes/techmap/zinit.o
 OBJS += passes/techmap/dff2dffs.o
 OBJS += passes/techmap/flowmap.o
-OBJS += passes/techmap/muxpack.o
 endif
 
 GENFILES += passes/techmap/techmap.inc