diff --git a/src/smallwrite/smallwrite_build.cpp b/src/smallwrite/smallwrite_build.cpp
index 534f4011..914349b8 100644
--- a/src/smallwrite/smallwrite_build.cpp
+++ b/src/smallwrite/smallwrite_build.cpp
@@ -533,9 +533,4 @@ set<ReportID> SmallWriteBuildImpl::all_reports() const {
     return reports;
 }
 
-size_t smwrSize(const SmallWriteEngine *smwr) {
-    assert(smwr);
-    return smwr->size;
-}
-
 } // namespace ue2
diff --git a/src/smallwrite/smallwrite_build.h b/src/smallwrite/smallwrite_build.h
index 82a03e38..92222d62 100644
--- a/src/smallwrite/smallwrite_build.h
+++ b/src/smallwrite/smallwrite_build.h
@@ -74,8 +74,6 @@ std::unique_ptr<SmallWriteBuild>
 makeSmallWriteBuilder(size_t num_patterns, const ReportManager &rm,
                       const CompileContext &cc);
 
-size_t smwrSize(const SmallWriteEngine *t);
-
 } // namespace ue2
 
 #endif // SMWR_BUILD_H