diff --git a/changes/bug27185 b/changes/bug27185
new file mode 100644
index 00000000000..79221b3df46
--- /dev/null
+++ b/changes/bug27185
@@ -0,0 +1,3 @@
+  o Minor bugfixes (Windows, compilation):
+    - Silence a compilation warning on MSVC 2017 and clang-cl.
+      Fixes bug 27185; bugfix on 0.2.2.2-alpha.
diff --git a/src/test/test.c b/src/test/test.c
index 383bc000022..a935ac36a6c 100644
--- a/src/test/test.c
+++ b/src/test/test.c
@@ -22,6 +22,8 @@
 #include <dirent.h>
 #endif /* defined(_WIN32) */
 
+#include <math.h>
+
 /* These macros pull in declarations for some functions and structures that
  * are typically file-private. */
 #define GEOIP_PRIVATE
@@ -31,14 +33,6 @@
 #define MAIN_PRIVATE
 #define STATEFILE_PRIVATE
 
-/*
- * Linux doesn't provide lround in math.h by default, but mac os does...
- * It's best just to leave math.h out of the picture entirely.
- */
-//#include <math.h>
-long int lround(double x);
-double fabs(double x);
-
 #include "or.h"
 #include "backtrace.h"
 #include "buffers.h"