diff --git a/CMakeLists.txt b/CMakeLists.txt
index 90e65206..2453fa50 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -611,7 +611,8 @@ else()
                           PUBLIC_HEADER "${public_headers}"
                           VERSION ${ZMQ_VERSION}
                           SOVERSION "${ZMQ_VERSION_MAJOR}.${ZMQ_VERSION_MINOR}.0"
-                          OUTPUT_NAME "libzmq")
+                          OUTPUT_NAME "libzmq"
+                          PREFIX "")
     if(ZMQ_BUILD_FRAMEWORK)
       set_target_properties(libzmq PROPERTIES
                             FRAMEWORK TRUE
@@ -629,7 +630,8 @@ else()
     set_target_properties(libzmq-static PROPERTIES
       PUBLIC_HEADER "${public_headers}"
       COMPILE_DEFINITIONS "ZMQ_STATIC"
-      OUTPUT_NAME "libzmq-static")
+      OUTPUT_NAME "libzmq-static"
+      PREFIX "")
 endif()
 
 target_link_libraries(libzmq ${CMAKE_THREAD_LIBS_INIT})
diff --git a/appveyor.yml b/appveyor.yml
index 638c4fcc..2d8b7b82 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,23 +14,27 @@ environment:
     - platform: Win32
       configuration: Release
       WITH_SODIUM: ON
-      WITH_TWEETNACL: OFF
+      WITH_TWEETNACL: ON
     - platform: Win32
+      configuration: Debug
+      WITH_SODIUM: ON
+      WITH_TWEETNACL: ON
+    - platform: x64
       configuration: Release
       WITH_SODIUM: ON
-      WITH_TWEETNACL: OFF
+      WITH_TWEETNACL: ON
     - platform: x64
       configuration: Debug
       WITH_SODIUM: ON
-      WITH_TWEETNACL: OFF
-    - platform: x64
-      configuration: Debug
-      WITH_SODIUM: ON
-      WITH_TWEETNACL: OFF
+      WITH_TWEETNACL: ON
     - platform: Win32
       configuration: Release
       WITH_SODIUM: OFF
       WITH_TWEETNACL: OFF
+    - platform: Win32
+      configuration: Release
+      WITH_SODIUM: ON
+      WITH_TWEETNACL: OFF
     - platform: Win32
       configuration: Release
       WITH_SODIUM: OFF
diff --git a/tweetnacl/contrib/randombytes/winrandom.c b/tweetnacl/contrib/randombytes/winrandom.c
index 187ef8fe..4d649f74 100644
--- a/tweetnacl/contrib/randombytes/winrandom.c
+++ b/tweetnacl/contrib/randombytes/winrandom.c
@@ -22,7 +22,7 @@ void randombytes(unsigned char *x,unsigned long long xlen)
     if (xlen < 1048576) i = (unsigned) xlen; else i = 1048576;
 
     ret = CryptGenRandom(hProvider, i, x);
-    if (ret != FALSE) {
+    if (ret == FALSE) {
       Sleep(1);
       continue;
     }