diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index 2253f979..10ea34b3 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -111,7 +111,7 @@ elseif(D_VERSION EQUAL 2)
 
     if(PHOBOS2_DIR)
         file(GLOB PHOBOS2_D ${PHOBOS2_DIR}/std/*.d)
-        file(GLOB PHOBOS2_D_MATH ${PHOBOS2_DIR}/std/internal/math/*.d)
+        file(GLOB_RECURSE PHOBOS2_D_INTERNAL ${PHOBOS2_DIR}/std/internal/*.d)
         file(GLOB PHOBOS2_D_C ${PHOBOS2_DIR}/std/c/*.d)
         if(UNIX)
             file(GLOB PHOBOS2_D_C_SYS ${PHOBOS2_DIR}/std/c/linux/*.d)
@@ -130,7 +130,7 @@ elseif(D_VERSION EQUAL 2)
             file(GLOB PHOBOS2_D_WIN ${PHOBOS2_DIR}/std/windows/*.d)
         endif(WIN32)
         list(APPEND PHOBOS2_D
-                ${PHOBOS2_D_MATH}
+                ${PHOBOS2_D_INTERNAL}
                 ${PHOBOS2_D_WIN}
                 ${PHOBOS2_D_C}
                 ${PHOBOS2_D_C_SYS}