diff --git a/CHANGES b/CHANGES
index 67aec60..f510e78 100644
--- a/CHANGES
+++ b/CHANGES
@@ -11,6 +11,15 @@ Porting:
 	When NETDB_INTERNAL is not available it should be set to -1.
 	Thanks to Baruch Siach for sending a patch.
 
+Building:
+	Makefile.in: procan.o build requires srcdir prefix for explicit source
+	file.
+	Thanks to Hongxu Jia and Andrew Schoolman for providing patches.
+
+	Makefile.in: the CC define for procan.o build failed when CC had more
+	than one word.
+	Thanks to Hongxu Jia for providing an inital patch.
+
 Testing:
 	test.sh: lots of corrections and improvements
 
diff --git a/Makefile.in b/Makefile.in
index c01b1a4..631d31d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -109,8 +109,8 @@ depend: $(CFILES) $(HFILES)
 socat: socat.o libxio.a
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ socat.o libxio.a $(CLIBS)
 
-procan.o: procan.c
-	$(CC) $(CFLAGS) -c -D CC=\"$(CC)\" -o $@ procan.c
+procan.o: $(srcdir)/procan.c
+	$(CC) $(CFLAGS) -c -D CC="\"$(CC)\"" -o $@ $(srcdir)/procan.c
 
 PROCAN_OBJS=procan_main.o procan.o procan-cdefs.o hostan.o error.o sycls.o sysutils.o utils.o vsnprintf_r.o snprinterr.o
 procan: $(PROCAN_OBJS)