diff --git a/1996/schweikh3/Makefile b/1996/schweikh3/Makefile
index 9fcc955dd..0a1facb23 100644
--- a/1996/schweikh3/Makefile
+++ b/1996/schweikh3/Makefile
@@ -129,7 +129,8 @@ all: data ${TARGET}
 	sandwich supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
-	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
+	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS} || \
+	    ${CC} ${CFLAGS} -I. '-Ddifftime(a,b)=(double)(b-a)' $< -o $@ ${LDFLAGS}
 
 # alternative executable
 #
diff --git a/1996/schweikh3/README.md b/1996/schweikh3/README.md
index 3e39ab8bd..b5e2c63ff 100644
--- a/1996/schweikh3/README.md
+++ b/1996/schweikh3/README.md
@@ -33,14 +33,6 @@ But still it is a useful utility.  To use try:
 
 and thanks for the virtual memories!  :-)
 
-NOTE: On some systems such as SunOS, one may need to compile with:
-
-```make
-	${CC} ${CFLAGS} \
-	  -I. -D_POSIX_SOURCE '-Ddifftime(a,b)=(double)(b-a)' \
-	  schweikh3.c -o schweikh3
-```
-
 
 ## Author's remarks:
 
diff --git a/thanks-for-help.md b/thanks-for-help.md
index 522020397..f9844e76b 100644
--- a/thanks-for-help.md
+++ b/thanks-for-help.md
@@ -2192,6 +2192,13 @@ suggested that one try the longer version too but it will run in an infinite
 loop so having it in a script is less desired).
 
 
+## <a name="1996_schweikh3"></a>[1996/schweikh3](/1996/schweikh3/schweikh3.c) ([README.md](/1996/schweikh3/README.md]))
+
+[Cody](#cody) updated the Makefile so that if it fails to compile it will try he
+method suggested for SunOS rather than having to update the Makefile manually or
+running a more complicated command: now one can just run `make`.
+
+
 ## <a name="1996_westley"></a>[1996/westley](/1996/westley/westley.c) ([README.md](/1996/westley/README.md]))
 
 [Cody](#cody) fixed a segfault in this entry as well as it displaying environmental