diff --git a/include/libbb.h b/include/libbb.h
index 78b390611..d390e6840 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -39,7 +39,6 @@
 #include <sys/wait.h>
 #include <termios.h>
 #include <time.h>
-#include <unistd.h>
 #include <sys/param.h>
 #ifdef HAVE_MNTENT_H
 # include <mntent.h>
diff --git a/include/platform.h b/include/platform.h
index f0b8ec10a..00ebe563b 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -362,6 +362,7 @@ typedef unsigned smalluint;
 
 #endif
 
+#include <unistd.h>
 #if (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L) || defined(__GLIBC__)
 # define fdprintf dprintf
 #endif