diff --git a/Misc/NEWS b/Misc/NEWS
index d9f8a949023..68403c695ba 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -222,6 +222,8 @@ Tests
 Build
 -----
 
+- Issue #9552: Avoid unnecessary rebuild of OpenSSL. (Windows)
+
 - Issue #1633863: Don't ignore $CC under AIX.
 
 - Issue #9810: Compile bzip2 source files in python's project file
diff --git a/PC/VS8.0/build_ssl.py b/PC/VS8.0/build_ssl.py
index 867fd4c4a3f..5a08a016af6 100644
--- a/PC/VS8.0/build_ssl.py
+++ b/PC/VS8.0/build_ssl.py
@@ -141,8 +141,8 @@ def fix_makefile(makefile):
             fout.write(line)
 
 def run_configure(configure, do_script):
-    print("perl Configure "+configure)
-    os.system("perl Configure "+configure)
+    print("perl Configure "+configure+" no-idea no-mdc2")
+    os.system("perl Configure "+configure+" no-idea no-mdc2")
     print(do_script)
     os.system(do_script)
 
@@ -161,12 +161,14 @@ def main():
         do_script = "ms\\do_nasm"
         makefile="ms\\nt.mak"
         m32 = makefile
+        dirsuffix = "32"
     elif sys.argv[2] == "x64":
         arch="amd64"
         configure = "VC-WIN64A"
         do_script = "ms\\do_win64a"
         makefile = "ms\\nt64.mak"
         m32 = makefile.replace('64', '')
+        dirsuffix = "64"
         #os.environ["VSEXTCOMP_USECL"] = "MS_OPTERON"
     else:
         raise ValueError(str(sys.argv))
@@ -223,6 +225,15 @@ def main():
             shutil.copy(r"crypto\buildinf.h", r"crypto\buildinf_%s.h" % arch)
             shutil.copy(r"crypto\opensslconf.h", r"crypto\opensslconf_%s.h" % arch)
 
+        # If the assembler files don't exist in tmpXX, copy them there
+        if perl is None:
+            if not os.path.exists("tmp"+dirsuffix):
+                os.mkdir("tmp"+dirsuffix)
+            for f in os.listdir("asm"+dirsuffix):
+                if not f.endswith(".asm"): continue
+                if os.path.isfile(r"tmp%s\%s" % (dirsuffix, f)): continue
+                shutil.copy(r"asm%s\%s" % (dirsuffix, f), "tmp"+dirsuffix)
+
         # Now run make.
         if arch == "amd64":
             rc = os.system("ml64 -c -Foms\\uptable.obj ms\\uptable.asm")
diff --git a/PCbuild/build_ssl.py b/PCbuild/build_ssl.py
index a75c1fbef3e..cfcb0ac8f1c 100644
--- a/PCbuild/build_ssl.py
+++ b/PCbuild/build_ssl.py
@@ -228,11 +228,13 @@ def main():
             shutil.copy(r"crypto\opensslconf.h", r"crypto\opensslconf_%s.h" % arch)
 
         # If the assembler files don't exist in tmpXX, copy them there
-        if not os.path.exists("tmp"+dirsuffix):
-            os.mkdir("tmp"+dirsuffix)
-        for f in os.listdir("asm"+dirsuffix):
-            if not f.endswith(".asm"): continue
-            shutil.copy(r"asm%s\%s" % (dirsuffix, f), "tmp"+dirsuffix)
+        if perl is None:
+            if not os.path.exists("tmp"+dirsuffix):
+                os.mkdir("tmp"+dirsuffix)
+            for f in os.listdir("asm"+dirsuffix):
+                if not f.endswith(".asm"): continue
+                if os.path.isfile(r"tmp%s\%s" % (dirsuffix, f)): continue
+                shutil.copy(r"asm%s\%s" % (dirsuffix, f), "tmp"+dirsuffix)
 
         # Now run make.
         if arch == "amd64":