@@ -39,11 +39,11 @@
 #import "OFNotOpenException.h"
 #import "OFOutOfRangeException.h"
 #import "OFReadFailedException.h"
 #import "OFWriteFailedException.h"
 
-#ifndef HAVE_POSIX_SPAWNP
+#if !defined(HAVE_POSIX_SPAWNP) || !defined(HAVE_SPAWN_H)
 extern char **environ;
 #endif
 
 @interface OFSubprocess ()
 - (void)of_getArgv: (char ***)argv
@@ -141,11 +141,11 @@
 		  forProgramName: programName
 		    andArguments: arguments];
 
 		@try {
 			env = [self of_environmentForDictionary: environment];
-#ifdef HAVE_POSIX_SPAWNP
+#if defined(HAVE_POSIX_SPAWNP) && defined(HAVE_SPAWN_H)
 			posix_spawn_file_actions_t actions;
 			posix_spawnattr_t attr;
 
 			if (posix_spawn_file_actions_init(&actions) != 0)
 				@throw [OFInitializationFailedException