diff --git a/SimulationRuntime/c/optimization/constraints/evalfDiffG.c b/SimulationRuntime/c/optimization/constraints/evalfDiffG.c
index ddb0569705d..ca322bd7d9b 100644
--- a/SimulationRuntime/c/optimization/constraints/evalfDiffG.c
+++ b/SimulationRuntime/c/optimization/constraints/evalfDiffG.c
@@ -74,7 +74,7 @@ Bool evalfDiffG(Index n, double * x, Bool new_x, Index m, Index njac, Index *iRo
 
 #if 0
     {
-	int i;
+  int i;
     FILE *pFile;
     char buffer[4096];
     pFile = fopen("jac_struct.m", "wt");
@@ -93,8 +93,8 @@ Bool evalfDiffG(Index n, double * x, Bool new_x, Index m, Index njac, Index *iRo
     fprintf(pFile, "%s", "\nH=[];\n");
     fprintf(pFile, "%s", "%%%%%%%%%%%%%%%%%%%%%%\n");
     for(i=0; i< njac; ++i){
-    	sprintf(buffer, "H(%i,%i) = 1;\n", iRow[i]+1, iCol[i]+1);
-    	fprintf(pFile,"%s", buffer);
+      sprintf(buffer, "H(%i,%i) = 1;\n", iRow[i]+1, iCol[i]+1);
+      fprintf(pFile,"%s", buffer);
     }
     fprintf(pFile, "%s", "%%%%%%%%%%%%%%%%%%%%%%\n");
     fprintf(pFile, "%s", "spy(H)\n");
diff --git a/SimulationRuntime/c/optimization/lagrangeFun/ipopt_hessian.c b/SimulationRuntime/c/optimization/lagrangeFun/ipopt_hessian.c
index 22b1c3a9694..d3485c5e0bd 100644
--- a/SimulationRuntime/c/optimization/lagrangeFun/ipopt_hessian.c
+++ b/SimulationRuntime/c/optimization/lagrangeFun/ipopt_hessian.c
@@ -115,8 +115,8 @@ Bool ipopt_h(int n, double *v, Bool new_x, double obj_factor, int m, double *lam
     fprintf(pFile, "%s", "\nH=[];\n");
     fprintf(pFile, "%s", "%%%%%%%%%%%%%%%%%%%%%%\n");
     for(i=0; i< nele_hess; ++i){
-    	sprintf(buffer, "H(%i,%i) = 1;\n", iRow[i]+1, iCol[i]+1);
-    	fprintf(pFile,"%s", buffer);
+      sprintf(buffer, "H(%i,%i) = 1;\n", iRow[i]+1, iCol[i]+1);
+      fprintf(pFile,"%s", buffer);
     }
     fprintf(pFile, "%s", "%%%%%%%%%%%%%%%%%%%%%%\n");
     fprintf(pFile, "%s", "spy(H)\n");