diff --git a/src/rustDemangle.cpp b/src/rustDemangle.cpp
index 217fe475b..e9d97dd1a 100644
--- a/src/rustDemangle.cpp
+++ b/src/rustDemangle.cpp
@@ -1027,7 +1027,7 @@ static NODISCARD overflow_status printer_print_ch(struct printer *printer, char
 
 static NODISCARD overflow_status printer_print_u64(struct printer *printer, uint64_t n) {
     char buf[32] = {0};
-    sprintf(buf, "%llu", (unsigned long long)n); // printing uint64 uses 21 < 32 chars
+    snprintf(buf, sizeof(buf), "%llu", (unsigned long long)n); // printing uint64 uses 21 < 32 chars
     return printer_print_str(printer, buf);
 }
 
@@ -1172,7 +1172,7 @@ static NODISCARD overflow_status printer_print_path(struct printer *printer, boo
         if (printer->out != NULL && !printer->alternate && dis != 0) {
             PRINT_STR(printer, "[");
             char buf[24] = {0};
-            sprintf(buf, "%llx", (unsigned long long)dis);
+            snprintf(buf, sizeof(buf), "%llx", (unsigned long long)dis);
             PRINT_STR(printer, buf);
             PRINT_STR(printer, "]");
         }