--- src/diffusion.cpp	2023-12-11 23:53:04.000000000 +0800
+++ src/diffusion.cpp	2024-01-20 03:07:04.000000000 +0800
@@ -109,7 +109,7 @@
   	}
   	if (err - ans > errziel) {
   		//		MONITOR(1, 5)++;
-  		err = (isfinite(ans)) ? errziel * (1 + zahl * 0.1) + ans : 2 * err;
+  		err = (std::isfinite(ans)) ? errziel * (1 + zahl * 0.1) + ans : 2 * err;
   		goto NEW;
   	}
   	return ans;

--- src/onetimes.cpp	2023-12-11 23:53:04.000000000 +0800
+++ src/onetimes.cpp	2024-01-20 03:10:35.000000000 +0800
@@ -525,7 +525,7 @@
       loglik += 2 * icdjs * xsi;
     }
     
-    if (!isfinite(loglik)) { restart = true; loglik = -1.0e10; }
+    if (!std::isfinite(loglik)) { restart = true; loglik = -1.0e10; }
     else restart = false;
     pars->restart = restart;
     free(x);

--- src/rwiener.cpp	2023-12-11 23:53:04.000000000 +0800
+++ src/rwiener.cpp	2024-01-20 03:16:07.000000000 +0800
@@ -159,7 +159,7 @@
     
     double sl = upper[j].slope;
     double help = log(fabs(sl)); int sign = sl > 0 ? 1 : -1;
-    if (isnan(sl)) {
+    if (std::isnan(sl)) {
       flag = true;
     }