diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 60dba054..75c2d5d8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -578,7 +578,7 @@ set(SOURCES ${SRC_CORE} ${SRC_DRIVERS_COMMON} ${SRC_DRIVERS_SDL})
 # the FCEUX_BUILD_TIMESTAMP preprocessor definition.
 # Note: with CMake >= 3.8.0, this will respect SOURCE_DATE_EPOCH. For more info,
 #       see <https://reproducible-builds.org/docs/source-date-epoch/>.
-string(TIMESTAMP BUILD_TS "%H:%M:%S  %b %d %Y")
+string(TIMESTAMP BUILD_TS "%H:%M:%S  %b %d %Y" UTC)
 add_definitions( -DFCEUX_BUILD_TIMESTAMP=\"${BUILD_TS}\" )
 
 if (WIN32)