diff --git a/src/wutil.cpp b/src/wutil.cpp
index 406dc00b3..4d03a5507 100644
--- a/src/wutil.cpp
+++ b/src/wutil.cpp
@@ -516,6 +516,15 @@ ssize_t wwrite_to_fd(const wchar_t *input, size_t input_len, int fd) {
     return success ? total_written : -1;
 }
 
+enum : wint_t {
+    PUA1_START = 0xE000,
+    PUA1_END = 0xF900,
+    PUA2_START = 0xF0000,
+    PUA2_END = 0xFFFFE,
+    PUA3_START = 0x100000,
+    PUA3_END = 0x10FFFE,
+};
+
 /// Return one if the code point is in a Unicode private use area.
 static int fish_is_pua(wint_t wc) {
     if (PUA1_START <= wc && wc < PUA1_END) return 1;
diff --git a/src/wutil.h b/src/wutil.h
index 6c27666fd..219e23fb4 100644
--- a/src/wutil.h
+++ b/src/wutil.h
@@ -106,13 +106,6 @@ inline ssize_t wwrite_to_fd(const wcstring &s, int fd) {
     return wwrite_to_fd(s.c_str(), s.size(), fd);
 }
 
-#define PUA1_START 0xE000
-#define PUA1_END 0xF900
-#define PUA2_START 0xF0000
-#define PUA2_END 0xFFFFE
-#define PUA3_START 0x100000
-#define PUA3_END 0x10FFFE
-
 // We need this because there are too many implementations that don't return the proper answer for
 // some code points. See issue #3050.
 #ifndef FISH_NO_ISW_WRAPPERS