diff --git a/configure.ac b/configure.ac
index f3f5e3e94d2..e13c4cfc57f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -176,9 +176,6 @@ esac
 dnl Add flags for gcc and g++
 if test "x$GCC" = xyes; then
     CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99"
-    if test "x$CLANG" = "xno"; then
-       CFLAGS="$CFLAGS -ffast-math"
-    fi
 
     # Enable -fvisibility=hidden if using a gcc that supports it
     save_CFLAGS="$CFLAGS"