diff --git a/ChangeLog b/ChangeLog
index bc12dddf6..e6870c75e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,10 @@
 
 	* Tools/gdomap.c: Don't open syslog connection until after we have
 	forked and closed old descriptors .. fix for bug #41751
+	* Headers/Foundation/NSData.h:
+	* Source/NSData.m:
+	* Source/NSString.m:
+	Fix for bug #41626
 
 2014-03-11  Richard Frith-Macdonald <rfm@gnu.org>
 
diff --git a/Headers/Foundation/NSData.h b/Headers/Foundation/NSData.h
index 1f7235abb..14f9bd78d 100644
--- a/Headers/Foundation/NSData.h
+++ b/Headers/Foundation/NSData.h
@@ -46,8 +46,11 @@ enum {
 };
 
 enum {
-  NSAtomicWrite = 1
+  NSDataWritingAtomic = 1
 };
+/* The original name for this was NSAtomicWrite ... need for backward comapat
+ */
+#define NSAtomicWrite   NSDataWritingAtomic
 #endif
 
 @interface NSData : NSObject <NSCoding, NSCopying, NSMutableCopying>
@@ -144,7 +147,7 @@ enum {
 #if OS_API_VERSION(MAC_OS_X_VERSION_10_4,GS_API_LATEST) 
 /**
  * <p>Writes a copy of the data encapsulated by the receiver to a file
- * at path.  If the NSAtomicWrite option is set, this writes to a
+ * at path.  If the NSDataWritingAtomic option is set, this writes to a
  * temporary file and then renames that to the file at path, thus
  * ensuring that path exists and does not contain partially written
  * data at any point.
diff --git a/Source/NSData.m b/Source/NSData.m
index 463ac96b7..721d47dd8 100644
--- a/Source/NSData.m
+++ b/Source/NSData.m
@@ -877,7 +877,7 @@ failure:
 {
   if (useAuxiliaryFile)
     {
-      return [self writeToFile: path options: NSAtomicWrite error: 0];
+      return [self writeToFile: path options: NSDataWritingAtomic error: 0];
     }
   else
     {
@@ -889,7 +889,7 @@ failure:
 {
   if (flag)
     {
-      return [self writeToURL: anURL options: NSAtomicWrite error: 0];
+      return [self writeToURL: anURL options: NSDataWritingAtomic error: 0];
     }
   else
     {
@@ -1328,7 +1328,7 @@ failure:
   BOOL		useAuxiliaryFile = NO;
   BOOL		error_BadPath = YES;
 
-  if (writeOptionsMask & NSAtomicWrite)
+  if (writeOptionsMask & NSDataWritingAtomic)
     {
       useAuxiliaryFile = YES;
     }
diff --git a/Source/NSString.m b/Source/NSString.m
index 19528f8cd..9a9666159 100644
--- a/Source/NSString.m
+++ b/Source/NSString.m
@@ -5352,7 +5352,7 @@ static NSFileManager *fm = nil;
       return NO;
     }
   return [d writeToFile: path
-	        options: atomically ? NSAtomicWrite : 0
+	        options: atomically ? NSDataWritingAtomic : 0
 		  error: error];
 }
 
@@ -5387,7 +5387,7 @@ static NSFileManager *fm = nil;
       return NO;
     }
   return [d writeToURL: url
-	       options: atomically ? NSAtomicWrite : 0
+	       options: atomically ? NSDataWritingAtomic : 0
 		 error: error];
 }