diff --git a/config/linux-gnulibc1 b/config/linux-gnulibc1
index ab7e28f73dd..95d7d644fcc 100644
--- a/config/linux-gnulibc1
+++ b/config/linux-gnulibc1
@@ -131,8 +131,6 @@ case $FC_BASENAME in
         H5_CFLAGS="$H5_CFLAGS"
 
         F9XSUFFIXFLAG=""
-# We force compiler to use upper case for external names
-# (just in case since this should be a default EIP)
         H5_FCFLAGS="$H5_FCFLAGS"
         FSEARCH_DIRS=""
 
@@ -162,9 +160,10 @@ case $FC_BASENAME in
     nagfor)
 
         F9XSUFFIXFLAG=""
-# We force compiler to use upper case for external names
-# (just in case since this should be a default EIP)
-        H5_FCFLAGS="$H5_FCFLAGS"
+        # NOTE: The default is -ieee=stop, which will cause problems
+        #       when the H5T module performs floating-point type
+        #       introspection
+        H5_FCFLAGS="$H5_FCFLAGS -ieee=full"
         FSEARCH_DIRS=""
 
         # Production