diff --git a/sys/unix/Install.unx b/sys/unix/Install.unx
index b257ff164..c2230a452 100644
--- a/sys/unix/Install.unx
+++ b/sys/unix/Install.unx
@@ -246,10 +246,10 @@ Notes:
 
 13. If you get a compiler warning about 'get_colors()' being implicitly
     declared, try uncommenting NEED_GET_COLORS_DECL in unixconf.h.
-    If you get a compiler complaint about tparmdecl() having conflicting
-    declarations, add '#define NOTPARMDECL' to unixconf.h or '-DNOTPARMDECL'
-    to CFLAGS in src/Makefile.  (The hints files for Mac OSX already do the
-    latter.)
+    If you get a compiler warning about tparm() being implicitly
+    declared, add '#define TPARM_WORKAROUND' to unixconf.h or
+    '-DTPARM_WORKAROUND' to CFLAGS.  (This should not be needed
+    on any modern system.)
 
 # NetHack 5.0  Install.unx       $NHDT-Date: 1577568915 2019/12/28 21:35:15 $  $NHDT-Branch: NetHack-5.0 $:$NHDT-Revision: 1.14 $
 # Copyright (c) 2012 by Kenneth Lorber, Kensington, Maryland
diff --git a/sys/unix/NetHack.xcodeproj/project.pbxproj b/sys/unix/NetHack.xcodeproj/project.pbxproj
index 81a1eb1b9..21666b10e 100644
--- a/sys/unix/NetHack.xcodeproj/project.pbxproj
+++ b/sys/unix/NetHack.xcodeproj/project.pbxproj
@@ -2219,7 +2219,6 @@
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_CFLAGS = (
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2301,7 +2300,6 @@
 				NH_UTIL_DIR = "$(NH_ROOT_DIR)/util";
 				OTHER_CFLAGS = (
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2332,7 +2330,6 @@
 				OTHER_CFLAGS = (
 					"-Wno-ambiguous-macro",
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2366,7 +2363,6 @@
 				OTHER_CFLAGS = (
 					"-Wno-ambiguous-macro",
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2415,7 +2411,6 @@
 				OTHER_CFLAGS = (
 					"-DMINIMAL_FOR_RECOVER",
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2442,7 +2437,6 @@
 				OTHER_CFLAGS = (
 					"-DMINIMAL_FOR_RECOVER",
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2498,7 +2492,6 @@
 				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
 				OTHER_CFLAGS = (
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
@@ -2535,7 +2528,6 @@
 				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
 				OTHER_CFLAGS = (
 					"-DNOMAIL",
-					"-DNOTPARMDECL",
 					"-DDEFAULT_WINDOW_SYS=\\\"tty\\\"",
 					"-DDLB",
 					"-DGREPPATH=\\\"/usr/bin/grep\\\"",
diff --git a/sys/unix/hints/include/compiler.500 b/sys/unix/hints/include/compiler.500
index acc5662d1..aa140c413 100755
--- a/sys/unix/hints/include/compiler.500
+++ b/sys/unix/hints/include/compiler.500
@@ -49,7 +49,7 @@ endif
 #CC= clang
 #CXX=clang++ -std=gnu++11
 
-CFLAGS=$(CCFLAGS) -I../include -DNOTPARMDECL
+CFLAGS=$(CCFLAGS) -I../include
 CFLAGS+=-Wall -Wextra  \
 	-Wreturn-type -Wunused -Wformat -Wswitch -Wshadow -Wwrite-strings
 CFLAGS+=-pedantic
@@ -133,7 +133,7 @@ endif  # clang-specific ends here
 
 ifdef MAKEFILE_SRC
 ifdef CPLUSPLUS_NEEDED
-CCXXFLAGS = -g -I../include -DNOTPARMDECL
+CCXXFLAGS = -g -I../include
 CCXXFLAGS+=-Wall -Wextra -Wno-missing-field-initializers \
         -Wreturn-type -Wunused -Wformat -Wswitch -Wshadow -Wwrite-strings
 CCXXFLAGS+=-pedantic
diff --git a/sys/unix/hints/include/cross-pre2.500 b/sys/unix/hints/include/cross-pre2.500
index ef6f1c04f..3a69cbe9f 100644
--- a/sys/unix/hints/include/cross-pre2.500
+++ b/sys/unix/hints/include/cross-pre2.500
@@ -338,8 +338,8 @@ WASM_CFLAGS += -Wshadow
 # Nethack C flags
 WASM_CFLAGS += $(WINCFLAGS)   #WINCFLAGS set from multiw-2.500
 WASM_CFLAGS += -DSYSCF -DSYSCF_FILE=\"/sysconf\" -DSECURE -DNHUUID
-#WASM_CFLAGS += -g -I../include -DNOTPARMDECL
-WASM_CFLAGS += -I../include -DNOTPARMDECL
+#WASM_CFLAGS += -g -I../include
+WASM_CFLAGS += -I../include
 # NetHack sources control
 WASM_CFLAGS += -DDLB
 WASM_CFLAGS += -DHACKDIR=\"$(HACKDIR)\"
diff --git a/util/mdgrep.pl b/util/mdgrep.pl
index 24dd3d0a8..888820a4c 100644
--- a/util/mdgrep.pl
+++ b/util/mdgrep.pl
@@ -51,7 +51,7 @@ $specials = {
 # TIMED_DELAY DEF_MAILREADER DEF_PAGER NO_SIGNAL PC_LOCKING LATTICE __GO32__
 # msleep NO_FILE_LINKS bsdi HPUX AMIFLUSH
 # SCREEN_BIOS SCREEN_DJGPPFAST SCREEN_VGA SCREEN_8514
-# EXEPATH NOTSTDC SELECTSAVED NOTPARMDECL
+# EXEPATH NOTSTDC SELECTSAVE
 
 # constants
 @const_true = qw/1 TRUE/;
diff --git a/win/tty/termcap.c b/win/tty/termcap.c
index ff8c4c2bf..a44e84ca5 100644
--- a/win/tty/termcap.c
+++ b/win/tty/termcap.c
@@ -895,8 +895,7 @@ cl_eos(void) /* free after Robert Viduya */
 
 #include <curses.h>
 
-#if !defined(LINUX) && !defined(__FreeBSD__) && !defined(__OpenBSD__) \
-	&& !defined(NOTPARMDECL)
+#if defined(TPARM_WORKAROUND)
 extern char *tparm();
 #endif