diff --git a/include/applets.h b/include/applets.h
index e5b19e0eb..462d91801 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -452,6 +452,9 @@
 #ifdef CONFIG_POWEROFF
 	APPLET(poweroff, poweroff_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_PRINTENV
+	APPLET(printenv, printenv_main, _BB_DIR_BIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_PRINTF
 	APPLET(printf, printf_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
 #endif
@@ -545,6 +548,9 @@
 #ifdef CONFIG_SULOGIN
 	APPLET(sulogin, sulogin_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_SUM
+	APPLET(sum, sum_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_SWAPONOFF
 	APPLET(swapoff, swap_on_off_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
 #endif
diff --git a/include/usage.h b/include/usage.h
index 128aee2f5..33ead14f5 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1949,6 +1949,12 @@
 	"Options:\n" \
 	"\t-d\t\tdelay interval for shutting off."
 
+#define printenv_trivial_usage \
+	"[VARIABLES...]"
+#define printenv_full_usage \
+	"print all or part of environment\n\n" \
+	"If no environment VARIABLE specified, print them all."
+
 #define printf_trivial_usage \
 	"FORMAT [ARGUMENT...]"
 #define printf_full_usage \
@@ -2316,6 +2322,14 @@
 	"\t-h\tName of the remote host for this login.\n" \
 	"\t-p\tPreserve environment."
 
+#define sum_trivial_usage \
+	"[rs] [files...]"
+#define sum_full_usage \
+	"checksum and count the blocks in a file\n\n" \
+	"Options:\n" \
+	"\t-r\tuse BSD sum algorithm (1K blocks)\n" \
+	"\t-s\tuse System V sum algorithm (512byte blocks)\n"
+
 #define swapoff_trivial_usage \
 	"[OPTION] [DEVICE]"
 #define swapoff_full_usage \