diff --git a/OpenEXR/IlmImf/CMakeLists.txt b/OpenEXR/IlmImf/CMakeLists.txt
index 9b2fb11317..7c165bd4cb 100644
--- a/OpenEXR/IlmImf/CMakeLists.txt
+++ b/OpenEXR/IlmImf/CMakeLists.txt
@@ -217,6 +217,7 @@ INSTALL ( FILES
   ImfRationalAttribute.h
   ImfFramesPerSecond.h
   ImfStandardAttributes.h
+  ImfStdIO.h
   ImfEnvmap.h
   ImfEnvmapAttribute.h
   ImfInt64.h
diff --git a/OpenEXR/IlmImf/Makefile.am b/OpenEXR/IlmImf/Makefile.am
index f537ba1fcf..f69be9a27d 100644
--- a/OpenEXR/IlmImf/Makefile.am
+++ b/OpenEXR/IlmImf/Makefile.am
@@ -127,6 +127,7 @@ libIlmImfinclude_HEADERS = ImfForward.h ImfAttribute.h ImfBoxAttribute.h \
 			   ImfRational.h ImfRationalAttribute.h \
 			   ImfFramesPerSecond.h \
 			   ImfStandardAttributes.h \
+			   ImfStdIO.h \
 			   ImfEnvmap.h \
 			   ImfEnvmapAttribute.h \
 			   ImfInt64.h ImfRgba.h \