diff --git a/test_conformance/conversions/fplib.h b/test_conformance/conversions/fplib.h
index 576e4afe..534550a3 100644
--- a/test_conformance/conversions/fplib.h
+++ b/test_conformance/conversions/fplib.h
@@ -14,6 +14,7 @@
 // limitations under the License.
 //
 #include <stdbool.h>
+#include <stdint.h>
 
 typedef enum
 {
diff --git a/test_conformance/half/test_config.h b/test_conformance/half/test_config.h
index a81f429d..8452fab6 100644
--- a/test_conformance/half/test_config.h
+++ b/test_conformance/half/test_config.h
@@ -16,6 +16,8 @@
 #ifndef TEST_CONFIG_H
 #define TEST_CONFIG_H
 
+#include <CL/cl.h>
+
 #define MULTITHREAD 1
 
 #define kVectorSizeCount    5
diff --git a/test_conformance/half/tests.h b/test_conformance/half/tests.h
index 2b14924c..a8b8328f 100644
--- a/test_conformance/half/tests.h
+++ b/test_conformance/half/tests.h
@@ -16,6 +16,8 @@
 #ifndef TESTS_H
 #define TESTS_H
 
+#include <CL/cl.h>
+
 typedef enum
 {
 	AS_Global,