diff --git a/.github/matrix.py b/.github/matrix.py
index 6e5b9247e..d3256561f 100644
--- a/.github/matrix.py
+++ b/.github/matrix.py
@@ -72,6 +72,7 @@ for CC in ["gcc", "clang"]:
                 "WURFL_LIB=contrib/wurfl",
                 "USE_DEVICEATLAS=1",
                 "DEVICEATLAS_SRC=contrib/deviceatlas",
+                "EXTRA_OBJS=contrib/prometheus-exporter/service-prometheus.o",
                 # "USE_51DEGREES=1",
                 # "FIFTYONEDEGREES_SRC=contrib/51d/src/pattern",
             ],
@@ -137,6 +138,7 @@ matrix.append(
             "WURFL_LIB=contrib/wurfl",
             "USE_DEVICEATLAS=1",
             "DEVICEATLAS_SRC=contrib/deviceatlas",
+            "EXTRA_OBJS=contrib/prometheus-exporter/service-prometheus.o",
             # "USE_51DEGREES=1",
             # "FIFTYONEDEGREES_SRC=contrib/51d/src/pattern",
         ],