diff -r e9dfb1e92481 -r 304f4f7b37d1 src/string.c
--- a/src/string.c	Fri Feb 21 21:06:07 2025 +0100
+++ b/src/string.c	Sat Feb 22 18:55:25 2025 +0100
@@ -612,16 +612,16 @@
 cxmutstr cx_strreplacen_a(
         const CxAllocator *allocator,
         cxstring str,
-        cxstring pattern,
+        cxstring search,
         cxstring replacement,
         size_t replmax
 ) {
 
-    if (pattern.length == 0 || pattern.length > str.length || replmax == 0)
+    if (search.length == 0 || search.length > str.length || replmax == 0)
         return cx_strdup_a(allocator, str);
 
     // Compute expected buffer length
-    size_t ibufmax = str.length / pattern.length;
+    size_t ibufmax = str.length / search.length;
     size_t ibuflen = replmax < ibufmax ? replmax : ibufmax;
     if (ibuflen > CX_STRREPLACE_INDEX_BUFFER_SIZE) {
         ibuflen = CX_STRREPLACE_INDEX_BUFFER_SIZE;
@@ -638,7 +638,7 @@
     cxstring searchstr = str;
     size_t found = 0;
     do {
-        cxstring match = cx_strstr(searchstr, pattern);
+        cxstring match = cx_strstr(searchstr, search);
         if (match.length > 0) {
             // Allocate next buffer in chain, if required
             if (curbuf->len == ibuflen) {
@@ -662,8 +662,8 @@
             found++;
             size_t idx = match.ptr - str.ptr;
             curbuf->buf[curbuf->len++] = idx;
-            searchstr.ptr = match.ptr + pattern.length;
-            searchstr.length = str.length - idx - pattern.length;
+            searchstr.ptr = match.ptr + search.length;
+            searchstr.length = str.length - idx - search.length;
         } else {
             break;
         }
@@ -672,7 +672,7 @@
     // Allocate result string
     cxmutstr result;
     {
-        long long adjlen = (long long) replacement.length - (long long) pattern.length;
+        long long adjlen = (long long) replacement.length - (long long) search.length;
         size_t rcount = 0;
         curbuf = &ibuf;
         do {
@@ -703,7 +703,7 @@
             }
 
             // Copy the replacement and skip the source pattern
-            srcidx += pattern.length;
+            srcidx += search.length;
             memcpy(destptr, replacement.ptr, replacement.length);
             destptr += replacement.length;
         }