@@ -35,10 +35,11 @@
 #import "OFNotificationCenter.h"
 #import "OFPair.h"
 #import "OFRunLoop+Private.h"
 #import "OFRunLoop.h"
 #import "OFSandbox.h"
+#import "OFStdIOStream.h"
 #import "OFString.h"
 #import "OFSystemInfo.h"
 #import "OFThread+Private.h"
 #import "OFThread.h"
 
@@ -258,13 +259,12 @@
 					continue;
 				}
 
 				pos = [tmp rangeOfString: @"="].location;
 				if (pos == OFNotFound) {
-					fprintf(stderr,
-					    "Warning: Invalid environment "
-					    "variable: %s\n", tmp.UTF8String);
+					OFLog(@"Warning: Invalid environment "
+					    "variable: %@", tmp);
 					continue;
 				}
 
 				key = [tmp substringToIndex: pos];
 				value = [tmp substringFromIndex: pos + 1];
@@ -300,13 +300,12 @@
 					continue;
 				}
 
 				pos = [tmp rangeOfString: @"="].location;
 				if (pos == OFNotFound) {
-					fprintf(stderr,
-					    "Warning: Invalid environment "
-					    "variable: %s\n", tmp.UTF8String);
+					OFLog(@"Warning: Invalid environment "
+					    "variable: %@", tmp);
 					continue;
 				}
 
 				key = [tmp substringToIndex: pos];
 				value = [tmp substringFromIndex: pos + 1];
@@ -394,12 +393,12 @@
 				void *pool = objc_autoreleasePoolPush();
 				OFString *key, *value;
 				char *sep;
 
 				if ((sep = strchr(*env, '=')) == NULL) {
-					fprintf(stderr, "Warning: Invalid "
-					    "environment variable: %s\n", *env);
+					OFLog(@"Warning: Invalid environment "
+					    "variable: %s", *env);
 					continue;
 				}
 
 				key = [OFString
 				    stringWithCString: *env