diff --git a/src/coverage.cpp b/src/coverage.cpp
index 3d3b3bc734eaa..100a4c66322bd 100644
--- a/src/coverage.cpp
+++ b/src/coverage.cpp
@@ -192,7 +192,7 @@ static void write_lcov_data(logdata_t &logData, const std::string &outfile)
     outf.close();
 }
 
-extern "C" void jl_write_coverage_data(const char *output)
+extern "C" JL_DLLEXPORT void jl_write_coverage_data(const char *output)
 {
     if (output) {
         StringRef output_pattern(output);
diff --git a/src/julia_internal.h b/src/julia_internal.h
index e18aa084d0f08..6890f03dcce1d 100644
--- a/src/julia_internal.h
+++ b/src/julia_internal.h
@@ -1635,7 +1635,7 @@ JL_DLLEXPORT enum jl_memory_order jl_get_atomic_order_checked(jl_sym_t *order, c
 
 struct _jl_image_fptrs_t;
 
-void jl_write_coverage_data(const char*);
+JL_DLLEXPORT void jl_write_coverage_data(const char*);
 void jl_write_malloc_log(void);
 
 #if jl_has_builtin(__builtin_unreachable) || defined(_COMPILER_GCC_) || defined(_COMPILER_INTEL_)