diff --git a/src/Make_ami.mak b/src/Make_ami.mak
index 05b731755e4886..e9d73df39f69f3 100644
--- a/src/Make_ami.mak
+++ b/src/Make_ami.mak
@@ -13,7 +13,6 @@ CFLAGS = -c -O3
 CFLAGS += \
 	-DNO_ARP \
 	-DUSE_TMPNAM \
-	-DHAVE_STDARG_H \
 	-DHAVE_TGETENT \
 	-DHAVE_TERMCAP \
 	-DNEW_SHELLSIZE \
diff --git a/src/if_python.c b/src/if_python.c
index ab79b9d9c86bd3..9607258fd1d2e8 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -51,9 +51,6 @@
 #ifdef HAVE_PUTENV
 # undef HAVE_PUTENV
 #endif
-#ifdef HAVE_STDARG_H
-# undef HAVE_STDARG_H	// Python's config.h defines it as well.
-#endif
 #ifdef _POSIX_C_SOURCE
 # undef _POSIX_C_SOURCE	// pyconfig.h defines it as well.
 #endif
diff --git a/src/if_python3.c b/src/if_python3.c
index 69e72e663bbe57..6ed457395f6802 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -57,9 +57,6 @@
 #ifdef HAVE_PUTENV
 # undef HAVE_PUTENV
 #endif
-#ifdef HAVE_STDARG_H
-# undef HAVE_STDARG_H   // Python's config.h defines it as well.
-#endif
 #ifdef _POSIX_C_SOURCE  // defined in feature.h
 # undef _POSIX_C_SOURCE
 #endif