diff --git a/Headers/gnustep/base/Array.h b/Headers/gnustep/base/Array.h
index 008b0cb6f..c27e98d91 100644
--- a/Headers/gnustep/base/Array.h
+++ b/Headers/gnustep/base/Array.h
@@ -40,7 +40,7 @@
 {
   @public
   unsigned int _capacity;
-  unsigned int _grow_factor;
+  int _grow_factor;
 }
 
 + (unsigned) defaultCapacity;
diff --git a/Source/objects/Array.h b/Source/objects/Array.h
index 008b0cb6f..c27e98d91 100644
--- a/Source/objects/Array.h
+++ b/Source/objects/Array.h
@@ -40,7 +40,7 @@
 {
   @public
   unsigned int _capacity;
-  unsigned int _grow_factor;
+  int _grow_factor;
 }
 
 + (unsigned) defaultCapacity;