diff --git configure.ac configure.ac
index 318cad4..9350f90 100644
--- configure.ac
+++ configure.ac
@@ -970,9 +970,9 @@
   ])
 
   dnl Check for fast maths
-  RDC_PROG_CC_FFLAGS([no-math-errno unsafe-math-optimizations no-rounding-math no-signaling-nans cx-limited-range])
+  RDC_PROG_CC_FFLAGS([no-math-errno unsafe-math-optimizations cx-limited-range])
   AC_LANG_PUSH(C++)
-  RDC_PROG_CXX_FFLAGS([no-math-errno unsafe-math-optimizations no-rounding-math no-signaling-nans cx-limited-range])
+  RDC_PROG_CXX_FFLAGS([no-math-errno unsafe-math-optimizations cx-limited-range])
   AC_LANG_POP
 
 AH_BOTTOM([