diff --git a/configure.ac b/configure.ac
index 56de1501..771a0cab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -940,9 +940,7 @@ AS_IF([test "x$EMSCRIPTEN" = "x"],[
   AC_MSG_CHECKING(for getrandom with a standard API)
   AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <stdlib.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #ifdef HAVE_SYS_RANDOM_H
 # include <sys/random.h>
 #endif
@@ -960,9 +958,7 @@ if (&getrandom != NULL) {
   AC_MSG_CHECKING(for getentropy with a standard API)
   AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <stdlib.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #ifdef HAVE_SYS_RANDOM_H
 # include <sys/random.h>
 #endif