diff --git a/Source/PeleLMeX_ProblemSpecificFunctions.cpp b/Source/PeleLMeX_ProblemSpecificFunctions.cpp
index e228a088..8c6cd905 100644
--- a/Source/PeleLMeX_ProblemSpecificFunctions.cpp
+++ b/Source/PeleLMeX_ProblemSpecificFunctions.cpp
@@ -50,9 +50,9 @@ problem_modify_ext_sources(
       for (int n = 0; n < NUM_ODE; n++) {
         Real B_n = state_old_arr[box_no](i, j, k, FIRSTODE + n);
         Real src_strength = -1.0 * pow(10.0,n+1);
-        ext_source_arr[box_no](i, j, k, FIRSTODE + n) += src;
+        ext_source_arr[box_no](i, j, k, FIRSTODE + n) += src_strength * B_n;
       }
     });
   Gpu::streamSynchronize();
   */
-}
\ No newline at end of file
+}