diff --git a/passes/pmgen/.gitignore b/passes/pmgen/.gitignore
index c9263057e..52dfd93f3 100644
--- a/passes/pmgen/.gitignore
+++ b/passes/pmgen/.gitignore
@@ -1 +1 @@
-/ice40_dsp_pm.h
+*_pm.h
diff --git a/passes/pmgen/Makefile.inc b/passes/pmgen/Makefile.inc
index e0609d9ba..5669bd3d1 100644
--- a/passes/pmgen/Makefile.inc
+++ b/passes/pmgen/Makefile.inc
@@ -1,8 +1,11 @@
-OBJS += passes/pmgen/ice40_dsp.o
+PMG_SRC = $(wildcard passes/pmgen/*.pmg)
+PMG_OBJS += $(patsubst %.pmg, %.o, $(PMG_SRC))
+OBJS += $(PMG_OBJS)
 
-passes/pmgen/ice40_dsp.o: passes/pmgen/ice40_dsp_pm.h
-EXTRA_OBJS += passes/pmgen/ice40_dsp_pm.h
-.SECONDARY: passes/pmgen/ice40_dsp_pm.h
+$(PMG_OBJS): %.o: %_pm.h
 
-passes/pmgen/ice40_dsp_pm.h: passes/pmgen/pmgen.py passes/pmgen/ice40_dsp.pmg
+EXTRA_OBJS += $(patsubst %.pmg, %_pm.h, $(PMG_SRC))
+.SECONDARY: $(EXTRA_OBJS)
+
+%_pm.h: passes/pmgen/pmgen.py %.pmg
 	$(P) mkdir -p passes/pmgen && python3 $^ $@