diff --git a/manifest b/manifest
index 7a33b8fa5a..0a7ef8f8c7 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\serror\scode\sSQLITE_BUSY_TIMEOUT,\sused\sinternally\sby\sthe\sOS\slayer\sto\sindicate\sthat\sa\scall\sto\sxShmLock()\shas\sfailed\sdue\sto\stimeout\sof\sa\sblocking\slock.
-D 2020-05-06T20:27:18.129
+C Fix\sa\sproblem\spreventing\sbuilding\swithout\sSQLITE_ENABLE_SETLK_TIMEOUT\sdefined.
+D 2020-05-06T20:45:11.359
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -517,7 +517,7 @@ F src/os.c 669cc3839cc35d20f81faf0be1ab6d4581cea35e9d8f3a9d48a98d6571f7c285
 F src/os.h 48388821692e87da174ea198bf96b1b2d9d83be5dfc908f673ee21fafbe0d432
 F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
 F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
-F src/os_unix.c ad4f910fd62b83c57dad364913d29a554a694a4461f489c2208306c63ce6eda2
+F src/os_unix.c 13f983da988b6460ef3c4c22099c67ab0938291e543644ac4d99eccc8ba604f1
 F src/os_win.c 035a813cbd17f355bdcad7ab894af214a9c13a1db8aeac902365350b98cd45a7
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
 F src/pager.c 96436cb1920074d4ade120a1a8a9d0ae3f52df06651e21b7eccc5eae2f02b111
@@ -1864,7 +1864,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 22de99ef410ba2a540871f3e61157d8dc4b969416f14808aeca73971b17fcd51
-R e0fe78ea85289605bc2618d432bfef86
+P f3ef9c7c2b4ba3de1057ad569f068b241d5f23e6629d8e0dacf85e57fd13b8aa
+R 300add0d813f0b2aa21b7602c0922ab2
 U dan
-Z f7eb10852628454cfaa15a83f2d2254d
+Z 6ae115939550b6311fe0efe8d583ce34
diff --git a/manifest.uuid b/manifest.uuid
index b5754b7308..a91752c03e 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-f3ef9c7c2b4ba3de1057ad569f068b241d5f23e6629d8e0dacf85e57fd13b8aa
\ No newline at end of file
+98eb54c6d83992886f17a00b6fc8998df230e3b5f45bafc6fae0d15a9ee5a4c6
\ No newline at end of file
diff --git a/src/os_unix.c b/src/os_unix.c
index fb172e7218..d510711087 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -4325,7 +4325,11 @@ static int unixShmSystemLock(
     f.l_len = n;
     res = osSetPosixAdvisoryLock(pShmNode->hShm, &f, pFile);
     if( res==-1 ){
+#ifdef SQLITE_ENABLE_SETLK_TIMEOUT
       rc = (pFile->iBusyTimeout ? SQLITE_BUSY_TIMEOUT : SQLITE_BUSY);
+#else
+      rc = SQLITE_BUSY;
+#endif
     }
   }