diff --git a/1990/theorem/Makefile b/1990/theorem/Makefile
index 758bf8cac..cf9710a31 100644
--- a/1990/theorem/Makefile
+++ b/1990/theorem/Makefile
@@ -133,6 +133,7 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
+	@echo "NOTE: this entry will segfault on no arg specified."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 sorter.c: ${PROG} ${PROG}.c
diff --git a/1990/theorem/README.md b/1990/theorem/README.md
index 2aeba6a60..d85a4675f 100644
--- a/1990/theorem/README.md
+++ b/1990/theorem/README.md
@@ -1,10 +1,10 @@
 # Best of Show
 
-	Adrian Mariano
-	University of Washington
-	2729 72nd Ave SE
-	Mercer Island, WA 98040
-	USA
+Adrian Mariano
+University of Washington
+2729 72nd Ave SE
+Mercer Island, WA 98040
+USA
 
 
 ## To build:
@@ -12,13 +12,12 @@
         make all
 
 [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed some segfaults
-under modern (and in some cases earlier) systems with this entry. He also fixed
-a segfault if not enough args are used. Originally we noted that the 4 trailing
-args '0 0 0 0' were required on systems that dump core when NULL is dereferenced
-but this problem showed itself in modern systems even with the 4 '0 0 0 0'. To
-make this easier for users Cody also kindly fixed this problem. Finally he
-changed this program to use `fgets()` not `gets()` to make it safer. Thank you
-Cody for your assistance!
+under modern (and in some cases earlier) systems with this entry. Originally we
+noted that the 4 trailing args '0 0 0 0' were required on systems that dump core
+when NULL is dereferenced but this problem showed itself in modern systems even
+with the 4 '0 0 0 0'. Finally he changed this program to use `fgets()` not
+`gets()` to make it safer and to prevent a warning about `gets()` at linking or
+runtime. Thank you Cody for your assistance!
 
 [Yusuke Endoh](/winners.html#Yusuke_Endoh) pointed out that `atof` nowadays
 needs `#include <stdlib.h>` which was used in order to get this to work
@@ -37,6 +36,7 @@ where:
 	h - step size
 	y1 - initial value  (y(x1) == y1)
 
+NOTE: this entry will segfault on no arg specified.
 
 ## Try:
 
@@ -76,7 +76,7 @@ reversing filter!  Try:
 Still not impressed?  The author throws in for free, a 
 sort program! Try:
 
-	cc sorter.c -o sorter
+	make sorter
 	ls | ./sorter
 
 This program is safe for home use as well.  The author has
@@ -89,7 +89,7 @@ And finally, as a special offer to users of this entry,
 the author provides a Fibonacci sequence generator!  Try:
 
     ./sorter 0 0 0 0 < theorem.c > fibonacci.c
-    cc fibonacci.c -o fibonacci
+    make fibonacci
     ./fibonacci 1 1
     ./fibonacci 2 1
 
diff --git a/1990/theorem/theorem.c b/1990/theorem/theorem.c
index cd2c619aa..db1d0de8b 100644
--- a/1990/theorem/theorem.c
+++ b/1990/theorem/theorem.c
@@ -24,7 +24,6 @@ w(g,R,u)float*g,u;char R;
 /**/{int b,f;A=atoi(++a);b=atoi(++a);while((f=A+b)<15000){printf("%d\n",f);A=b;b=f;}}
 main(A,a)int A;char*a[];
 o o
-if (a[1]==NULL||a[2]==NULL||a[3]==NULL||a[4]==NULL||a[5]==NULL) return 1;
 if(!strcmp(*++a,"-r"))S();
 D=atof(*++a);
 T=atof(*++a);