diff --git a/intern/cycles/cmake/external_libs.cmake b/intern/cycles/cmake/external_libs.cmake
index c3a9e00ca10..dda24961339 100644
--- a/intern/cycles/cmake/external_libs.cmake
+++ b/intern/cycles/cmake/external_libs.cmake
@@ -36,7 +36,7 @@ ENDIF()
 # OpenImageIO
 
 FIND_LIBRARY(OPENIMAGEIO_LIBRARY NAMES OpenImageIO PATHS ${CYCLES_OIIO}/lib ${CYCLES_OIIO}/dist)
-FIND_PATH(OPENIMAGEIO_INCLUDES OpenImageIO/imageio.h ${CYCLES_OIIO}/include ${CYCLES_OIIO}/dist)
+FIND_PATH(OPENIMAGEIO_INCLUDES OpenImageIO/imageio.h PATHS ${CYCLES_OIIO}/include ${CYCLES_OIIO}/dist)
 FIND_PROGRAM(OPENIMAGEIO_IDIFF NAMES idiff PATHS ${CYCLES_OIIO}/bin ${CYCLES_OIIO}/dist)
 
 IF(OPENIMAGEIO_INCLUDES AND OPENIMAGEIO_LIBRARY)
@@ -76,7 +76,7 @@ IF(WITH_CYCLES_OSL)
 	MESSAGE(STATUS "CYCLES_OSL = ${CYCLES_OSL}")
 
 	FIND_LIBRARY(OSL_LIBRARIES NAMES oslexec oslcomp oslquery PATHS ${CYCLES_OSL}/lib ${CYCLES_OSL}/dist)
-	FIND_PATH(OSL_INCLUDES OSL/oslclosure.h ${CYCLES_OSL}/include ${CYCLES_OSL}/dist)
+	FIND_PATH(OSL_INCLUDES OSL/oslclosure.h PATHS ${CYCLES_OSL}/include ${CYCLES_OSL}/dist)
 	FIND_PROGRAM(OSL_COMPILER NAMES oslc PATHS ${CYCLES_OSL}/bin ${CYCLES_OSL}/dist)
 
 	IF(OSL_INCLUDES AND OSL_LIBRARIES AND OSL_COMPILER)