diff --git a/HACKING b/HACKING
index 586b960c42213023ba39163854905f0939161001..ac3e9d7f9737915f77caf6f0f6abb46e81ad2f6d 100644
--- a/HACKING
+++ b/HACKING
@@ -109,7 +109,7 @@ issues, such as leaks or use of uninitialized variables.
 
 Some tests are skipped by default in a development environment, based on the
 time they take in comparison to the likelihood that those tests will turn up
-problems during incremental builds. These tests default to being run when when
+problems during incremental builds. These tests default to being run when
 building from a tarball or with the configure option --enable-expensive-tests;
 you can also force a one-time toggle of these tests by setting
 VIR_TEST_EXPENSIVE to 0 or 1 at make time, as in:
diff --git a/docs/hacking.html.in b/docs/hacking.html.in
index b2ef85a755e10614e390e3f27a015e1f8b29c8d8..9c6dd2682020736d01e41eee1269f37d2b79ee2d 100644
--- a/docs/hacking.html.in
+++ b/docs/hacking.html.in
@@ -122,7 +122,7 @@
           Some tests are skipped by default in a development environment,
           based on the time they take in comparison to the likelihood
           that those tests will turn up problems during incremental builds.
-          These tests default to being run when when building from a
+          These tests default to being run when building from a
           tarball or with the configure option --enable-expensive-tests;
           you can also force a one-time toggle of these tests by
           setting VIR_TEST_EXPENSIVE to 0 or 1 at make time, as in: