diff --git a/sdt-asm-glibc.patch b/sdt-asm-glibc.patch
index c8d1a46..878a01d 100644
--- a/sdt-asm-glibc.patch
+++ b/sdt-asm-glibc.patch
@@ -116,3 +116,31 @@ index 4f2539c93..530a79175 100644
 +    else
 +        printf("FAIL: %s (%d/%d != 42/43)\n", $$name, $arg1, $arg2)
 +}
+commit 1d3653936 (HEAD -> master, origin/master, origin/HEAD)
+Author: Frank Ch. Eigler <fche@redhat.com>
+Date:   Mon Dec 6 12:06:06 2021 -0500
+
+    sys/sdt.h fp constraints cont'd, x86-64 edition
+    
+    It appears that various versions of gcc continue to show signs of
+    confusion at our newly offered asm-operand alternatives for floating
+    point sdt.h marker parameters.
+    
+    e.g., https://bugzilla.redhat.com/show_bug.cgi?id=2028798
+    
+    We may need to restore previous constraints broadly, forcing the
+    compiler to plop floating point parameters into integer storage.
+
+diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h
+index 24d5e01c3..3e1f00b6c 100644
+--- a/includes/sys/sdt.h
++++ b/includes/sys/sdt.h
+@@ -101,7 +101,7 @@
+ # if defined __powerpc__
+ # define STAP_SDT_ARG_CONSTRAINT        nZr
+ # elif defined __x86_64__
+-# define STAP_SDT_ARG_CONSTRAINT norfxy
++# define STAP_SDT_ARG_CONSTRAINT norx
+ # elif defined __aarch64__
+ # define STAP_SDT_ARG_CONSTRAINT norw
+ # elif defined __s390__ || defined __s390x__
diff --git a/systemtap.spec b/systemtap.spec
index 6820423..57ca607 100644
--- a/systemtap.spec
+++ b/systemtap.spec
@@ -118,7 +118,7 @@ m     stapdev  stapdev
 
 Name: systemtap
 Version: 4.6
-Release: 3%{?release_override}%{?dist}
+Release: 4%{?release_override}%{?dist}
 # for version, see also configure.ac
 
 
@@ -1277,6 +1277,9 @@ exit 0
 
 # PRERELEASE
 %changelog
+* Mon Dec 06 2021 Stan Cox <scox@redhat.com> - 4.6.4
+- sys/sdt.h remove float constraints that may cause gcc reload issues.
+
 * Thu Dec 02 2021 Frank Ch. Eigler <fche@redhat.com> - 4.6.3
 - rhbz2972798 - nfs tapset tweaks
 - sys/sdt.h fixes for glibc ftbfs