diff --git a/master/custom/builders.py b/master/custom/builders.py
index a44b7a83..f7834e8c 100644
--- a/master/custom/builders.py
+++ b/master/custom/builders.py
@@ -23,6 +23,7 @@
     SharedUnixBuild,
     SlowDebugUnixBuild,
     SlowNonDebugUnixBuild,
+    SlowNonDebugUnixBuild15BitDigits,
     SlowUnixInstalledBuild,
     NonDebugUnixBuild,
     UnixInstalledBuild,
@@ -157,7 +158,7 @@
     ("PPC64LE Fedora Stable Clang Installed", "cstratak-fedora-stable-ppc64le", ClangUnixInstalledBuild),
 
     # Linux armv7l (32-bit) GCC
-    ("ARM Raspbian", "gps-raspbian", SlowNonDebugUnixBuild),
+    ("ARM Raspbian", "gps-raspbian", SlowNonDebugUnixBuild15BitDigits),
 
     # Linux armv8 (64-bit) GCC
     ("ARM64 Raspbian", "stan-raspbian", SlowNonDebugUnixBuild),
diff --git a/master/custom/factories.py b/master/custom/factories.py
index 9a5ce1c0..b5a3e301 100644
--- a/master/custom/factories.py
+++ b/master/custom/factories.py
@@ -379,6 +379,13 @@ class SlowNonDebugUnixBuild(NonDebugUnixBuild):
     testFlags = [*NonDebugUnixBuild.testFlags, "-u-cpu"]
 
 
+class SlowNonDebugUnixBuild15BitDigits(SlowNonDebugUnixBuild):
+    configureFlags = [
+        *SlowNonDebugUnixBuild.configureFlags,
+        "--enable-big-digits=15",
+    ]
+
+
 class SlowDebugUnixBuild(UnixBuild):
     test_timeout = SLOW_TIMEOUT
     testFlags = [*UnixBuild.testFlags, "-u-cpu"]