4 files changed, 4 insertions, 4 deletions
diff --git a/hl/c++/CMakeLists.txt b/hl/c++/CMakeLists.txt
index 71e5bb3..a62d9d4 100644
--- a/hl/c++/CMakeLists.txt
+++ b/hl/c++/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required (VERSION 3.10)
-PROJECT (HDF5_HL_CPP)
+project (HDF5_HL_CPP CXX)
 
 #-----------------------------------------------------------------------------
 # Main HL lib is in /src
diff --git a/hl/c++/examples/CMakeLists.txt b/hl/c++/examples/CMakeLists.txt
index 7f0d422..1760d71 100644
--- a/hl/c++/examples/CMakeLists.txt
+++ b/hl/c++/examples/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required (VERSION 3.10)
-PROJECT (HDF5_HL_CPP_EXAMPLES)
+project (HDF5_HL_CPP_EXAMPLES CXX)
 
 # --------------------------------------------------------------------
 #  Add in the examples for the Packet Table codes
diff --git a/hl/c++/src/CMakeLists.txt b/hl/c++/src/CMakeLists.txt
index 53194d0..10a0c1e 100644
--- a/hl/c++/src/CMakeLists.txt
+++ b/hl/c++/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required (VERSION 3.10)
-PROJECT (HDF5_HL_CPP_SRC)
+project (HDF5_HL_CPP_SRC CXX)
 
 #-----------------------------------------------------------------------------
 # Define Sources
diff --git a/hl/c++/test/CMakeLists.txt b/hl/c++/test/CMakeLists.txt
index aab3049..710e218 100644
--- a/hl/c++/test/CMakeLists.txt
+++ b/hl/c++/test/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required (VERSION 3.10)
-PROJECT (HDF5_HL_CPP_TEST)
+project (HDF5_HL_CPP_TEST CXX)
 
 add_executable (hl_ptableTest ${HDF5_HL_CPP_TEST_SOURCE_DIR}/ptableTest.cpp)
 set_property(TARGET hl_ptableTest APPEND PROPERTY INCLUDE_DIRECTORIES "${HDF5_HL_SRC_DIR}/test;${HDF5_SRC_DIR};${HDF5_BINARY_DIR}")