diff --git a/icu4c/source/i18n/caniter.cpp b/icu4c/source/i18n/caniter.cpp
index 0b4bcbf208e..5faba6c25b4 100644
--- a/icu4c/source/i18n/caniter.cpp
+++ b/icu4c/source/i18n/caniter.cpp
@@ -10,6 +10,8 @@
 #include "hash.h"
 #include "unormimp.h"
 #include "caniter.h"
+#include "unicode/normlzr.h"
+#include "unicode/uchar.h"
 #include "cmemory.h"
 
 /**
diff --git a/icu4c/source/i18n/caniter.h b/icu4c/source/i18n/caniter.h
index fcb5d8f3f10..8aa357a8eed 100644
--- a/icu4c/source/i18n/caniter.h
+++ b/icu4c/source/i18n/caniter.h
@@ -11,9 +11,6 @@
 #include "unicode/utypes.h"
 #include "unicode/uobject.h"
 #include "unicode/unistr.h"
-#include "unicode/uniset.h"
-#include "unicode/normlzr.h"
-#include "unicode/unicode.h"
 
 #define SKIP_ZEROES TRUE
 
diff --git a/icu4c/source/i18n/ucol_elm.cpp b/icu4c/source/i18n/ucol_elm.cpp
index e80d9947c77..4972c45709d 100644
--- a/icu4c/source/i18n/ucol_elm.cpp
+++ b/icu4c/source/i18n/ucol_elm.cpp
@@ -26,6 +26,7 @@
 #include "unicode/uchar.h"
 #include "unicode/unistr.h"
 #include "unicode/ucoleitr.h"
+#include "unicode/normlzr.h"
 #include "ucol_elm.h"
 #include "unormimp.h"
 #include "caniter.h"
diff --git a/icu4c/source/test/intltest/canittst.cpp b/icu4c/source/test/intltest/canittst.cpp
index 9e86b06e759..c2db8054cc9 100644
--- a/icu4c/source/test/intltest/canittst.cpp
+++ b/icu4c/source/test/intltest/canittst.cpp
@@ -13,6 +13,7 @@
 #include "cstring.h"
 #include "canittst.h"
 #include "caniter.h"
+#include "unicode/uchar.h"
 
 #define ARRAY_LENGTH(array) ((int32_t)(sizeof (array) / sizeof (*array)))