Index: adios-1.9.0/src/core/adios_internals.c
===================================================================
--- adios-1.9.0/src/core/adios_internals.c
+++ adios-1.9.0/src/core/adios_internals.c
@@ -4967,7 +4967,7 @@ int adios_generate_var_characteristics_v
         size = 0; \
         while ((size * b) < total_size) \
         { \
-            if (isnan (data [size]) || !isfinite (data [size])) {\
+	         if (isnan ((double) data [size]) || !isfinite ((double) data [size])) { \
                 size ++; \
                 continue; \
             }\