--- oiio-Release-2.2.18.0/src/field3d.imageio/field3d_pvt.h.orig
+++ oiio-Release-2.2.18.0/src/field3d.imageio/field3d_pvt.h
@@ -8,7 +8,7 @@
 #include <OpenImageIO/Imath.h>
 
 #if OIIO_USING_IMATH >= 3
-#    include <Imath/ImathBox.h>
+#    include <Imath-3/ImathBox.h>
 #else
 #    include <OpenEXR/ImathBox.h>
 #endif
--- oiio-Release-2.2.18.0/src/include/OpenImageIO/Imath.h.in.orig
+++ oiio-Release-2.2.18.0/src/include/OpenImageIO/Imath.h.in
@@ -13,10 +13,10 @@
 #define OIIO_USING_IMATH @OIIO_USING_IMATH@
 
 #if OIIO_USING_IMATH >= 3
-#   include <Imath/ImathColor.h>
-#   include <Imath/ImathMatrix.h>
-#   include <Imath/ImathVec.h>
-#   include <Imath/half.h>
+#   include <Imath-3/ImathColor.h>
+#   include <Imath-3/ImathMatrix.h>
+#   include <Imath-3/ImathVec.h>
+#   include <Imath-3/half.h>
 #else
 #   include <OpenEXR/ImathColor.h>
 #   include <OpenEXR/ImathMatrix.h>
--- oiio-Release-2.2.18.0/src/libOpenImageIO/imagebufalgo_xform.cpp.orig
+++ oiio-Release-2.2.18.0/src/libOpenImageIO/imagebufalgo_xform.cpp
@@ -18,7 +18,7 @@
 #include <OpenImageIO/thread.h>
 
 #if OIIO_USING_IMATH >= 3
-#    include <Imath/ImathBox.h>
+#    include <Imath-3/ImathBox.h>
 #else
 #    include <OpenEXR/ImathBox.h>
 #endif
--- oiio-Release-2.2.18.0/src/libutil/fmath_test.cpp.orig
+++ oiio-Release-2.2.18.0/src/libutil/fmath_test.cpp
@@ -18,7 +18,7 @@
 #include <OpenImageIO/unittest.h>
 
 #if OIIO_USING_IMATH >= 3
-#    include <Imath/ImathFun.h>
+#    include <Imath-3/ImathFun.h>
 #else
 #    include <OpenEXR/ImathFun.h>
 #endif
--- oiio-Release-2.2.18.0/src/libutil/typedesc_test.cpp.orig
+++ oiio-Release-2.2.18.0/src/libutil/typedesc_test.cpp
@@ -9,7 +9,7 @@
 #include <OpenImageIO/Imath.h>
 
 #if OIIO_USING_IMATH >= 3
-#    include <Imath/ImathBox.h>
+#    include <Imath-3/ImathBox.h>
 #else
 #    include <OpenEXR/ImathBox.h>
 #endif