diff --git a/Misc/NEWS b/Misc/NEWS
index a7b49de..c326855 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -111,6 +111,11 @@
 - Issue #10475: Don't hardcode compilers for LDSHARED/LDCXXSHARED on NetBSD
   and DragonFly BSD.  Patch by Nicolas Joly.
 
+- Issue #10655: Fix the build on PowerPC on Linux with GCC when building with
+  timestamp profiling (--with-tsc): the preprocessor test for the PowerPC
+  support now looks for "__powerpc__" as well as "__ppc__": the latter seems to
+  only be present on OS X; the former is the correct one for Linux with GCC.
+
 Tests
 -----
 
diff --git a/Python/ceval.c b/Python/ceval.c
index e848fb0..f3433f1 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -27,10 +27,11 @@
 
 typedef unsigned long long uint64;
 
-#if defined(__ppc__) /* <- Don't know if this is the correct symbol; this
-                           section should work for GCC on any PowerPC
-                           platform, irrespective of OS.
-                           POWER?  Who knows :-) */
+/* PowerPC suppport.
+   "__ppc__" appears to be the preprocessor definition to detect on OS X, whereas
+   "__powerpc__" appears to be the correct one for Linux with GCC
+*/
+#if defined(__ppc__) || defined (__powerpc__)
 
 #define READ_TIMESTAMP(var) ppc_getcounter(&var)