diff --git a/src/libs/guestPrintf.cpp b/src/libs/guestPrintf.cpp
index 0637d653d..afc61624f 100644
--- a/src/libs/guestPrintf.cpp
+++ b/src/libs/guestPrintf.cpp
@@ -527,7 +527,12 @@ static int kyty_printf_internal(bool sn, char* sn_s, size_t sn_n, const char* fo
 			} else if (*format == '*') {
 				// const int prec = (int)va_arg(va, int);
 				const int prec = VaArg_int(va_list);
-				precision      = prec > 0 ? static_cast<unsigned int>(prec) : 0U;
+				if (prec < 0) {
+					// A negative dynamic precision is treated as omitted.
+					flags &= ~FLAGS_PRECISION;
+				} else {
+					precision = static_cast<unsigned int>(prec);
+				}
 				format++;
 			}
 		}