diff --git a/Code/IO/otbImageMetadataInterface.cxx b/Code/IO/otbImageMetadataInterface.cxx
index 86b462e04976594d579d467ee031816b442bff9e..5085945a7161394ea7de72f1480f4bc21c1e8773 100644
--- a/Code/IO/otbImageMetadataInterface.cxx
+++ b/Code/IO/otbImageMetadataInterface.cxx
@@ -911,11 +911,11 @@ ImageMetadataInterface::GetQuickbirdPhysicalGain( const MetaDataDictionaryType &
   gain.SetSize(5);
   if (isPost20030606)
   {
-    gain[0] = 0.16200;//Pan
-    gain[1] = 0.23590;//Blue
-    gain[2] = 0.14530;//Green
-    gain[3] = 0.17850;//Red
-    gain[4] = 0.13530;//NIR
+    gain[0] = 1. / 0.16200;//Pan
+    gain[1] = 1. / 0.23590;//Blue
+    gain[2] = 1. / 0.14530;//Green
+    gain[3] = 1. / 0.17850;//Red
+    gain[4] = 1. / 0.13530;//NIR
   }
   else
   {