diff --git a/cmake/modules/OmrDetectSystemInformation.cmake b/cmake/modules/OmrDetectSystemInformation.cmake
index d1db8022e3a..d87c4699ef5 100644
--- a/cmake/modules/OmrDetectSystemInformation.cmake
+++ b/cmake/modules/OmrDetectSystemInformation.cmake
@@ -193,6 +193,17 @@ macro(omr_detect_system_information)
 			if("${CMAKE_C_SIMULATE_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
 				# clang on Windows mimics MSVC
 				set(_OMR_TOOLCONFIG "msvc")
+			elseif(CMAKE_C_COMPILER_ID MATCHES "^Clang$")
+				# OpenXL17 uses CMAKE_C_COMPILER_ID "Clang" for AIX
+				set(_OMR_TOOLCONFIG "gnu")
+				set(CMAKE_C_COMPILER_IS_OPENXL TRUE CACHE BOOL "OpenXL is the C compiler")
+				if(CMAKE_C_COMPILER_IS_OPENXL)
+					set(OMR_ENV_OPENXL 1)
+					set(ENV{OMR_ENV_OPENXL} ${OMR_ENV_OPENXL})
+				else()
+					set(OMR_ENV_OPENXL 0)
+					set(ENV{OMR_ENV_OPENXL} ${OMR_ENV_OPENXL})
+				endif()
 			else()
 				# TODO we don't actually have a clang config
 				# just use GNU config