diff --git a/gawk.spec b/gawk.spec
index 8934887..cee6b64 100644
--- a/gawk.spec
+++ b/gawk.spec
@@ -214,7 +214,7 @@ git commit --all --amend --no-edit > /dev/null
 autoreconf --force --verbose
 
 %configure
-%make_build
+%make_build CLAGS="%{optflags} -ffp-contract=off"
 
 # Build the documentation in PDF, postscript and HTML versions:
 %make_build -C doc pdf