diff --git a/SGP4.cpp b/SGP4.cpp
index 31cc052..fb9f4d4 100644
--- a/SGP4.cpp
+++ b/SGP4.cpp
@@ -43,7 +43,8 @@
 #define THDT     (4.37526908801129966e-3)
 
 SGP4::SGP4(void) {
-    first_run_ = true;
+
+    Reset();
 }
 
 SGP4::~SGP4(void) {
@@ -54,7 +55,7 @@ void SGP4::SetTle(const Tle& tle) {
     /*
      * reset all constants etc
      */
-    ResetGlobalVariables();
+    Reset();
 
     /*
      * extract and format tle data
@@ -1241,7 +1242,7 @@ void SGP4::DeepSpaceIntegrator(const double delt, const double step2,
     d_atime_ += delt;
 }
 
-void SGP4::ResetGlobalVariables() {
+void SGP4::Reset() {
 
     /*
      * common variables
diff --git a/SGP4.h b/SGP4.h
index 2f6c9c6..8a433ab 100644
--- a/SGP4.h
+++ b/SGP4.h
@@ -119,7 +119,7 @@ private:
     void DeepSpaceCalcDotTerms(double* xndot, double* xnddt, double* xldot) const;
     void DeepSpaceIntegrator(const double delt, const double step2,
             const double xndot, const double xnddt, const double xldot)const;
-    void ResetGlobalVariables();
+    void Reset();
 
     bool first_run_;
     bool use_simple_model_;