diff -p -up L-1.21/src/Lglobals.cc.orig L-1.21/src/Lglobals.cc
--- L-1.21/src/Lglobals.cc.orig	2009-03-25 19:51:06.000000000 -0300
+++ L-1.21/src/Lglobals.cc	2009-03-25 19:51:31.000000000 -0300
@@ -348,7 +348,7 @@ void extend_prime_table(int x)
   number_primes = 0;
 
   // Use explicit prime number theorem to allocate enough memory for primes
-  number_primes_guess = max((int)ceil(x/(log(x)-4))+1, 100);
+  number_primes_guess = max((int)ceil(x/(log((double)x)-4))+1, 100);
 
   prime_table = new int[number_primes_guess];
 
@@ -361,7 +361,7 @@ void extend_prime_table(int x)
     sieve[n] = 1;
 
   p = 2;
-  sqrtx = (int) sqrt(x);
+  sqrtx = (int) sqrt((double)x);
   while (p <= sqrtx)
   {
     n = 2*p;
diff -p -up L-1.21/include/Ldokchitser.h.orig L-1.21/include/Ldokchitser.h
--- L-1.21/include/Ldokchitser.h.orig	2009-03-25 19:58:42.000000000 -0300
+++ L-1.21/include/Ldokchitser.h	2009-03-25 19:59:33.000000000 -0300
@@ -31,7 +31,7 @@ phi_series(int precision)
             if (j != k)
             {    
                 diff = 2*(lambda[j] - lambda[k]);
-                if((imag(diff)==0) && (fmod(real(diff),2) == 0) && (real(diff)<=0))
+                if((imag(diff)==0) && (fmod((double)real(diff),2) == 0) && (real(diff)<=0))
                 {
                     pordtmp[j]+=pordtmp[k];
                     pordtmp[k]=0;