diff --git a/src/engine/platform/snes.cpp b/src/engine/platform/snes.cpp
index fb36cabdb..ad955cf98 100644
--- a/src/engine/platform/snes.cpp
+++ b/src/engine/platform/snes.cpp
@@ -841,7 +841,7 @@ void DivPlatformSNES::reset() {
   memcpy(sampleMem,copyOfSampleMem,65536);
   dsp.init(sampleMem);
   dsp.set_output(NULL,0);
-  dsp.setupInterpolation(interpolationOn);
+  dsp.setupInterpolation(!interpolationOff);
 
   memset(regPool,0,128);
   // this can't be 0 or channel 1 won't play
@@ -1026,7 +1026,7 @@ void DivPlatformSNES::setFlags(const DivConfig& flags) {
 
   initEchoMask=flags.getInt("echoMask",0);
 
-  interpolationOn=flags.getBool("interpolationOn",true);
+  interpolationOff=flags.getBool("interpolationOff",false);
 }
 
 int DivPlatformSNES::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
diff --git a/src/engine/platform/snes.h b/src/engine/platform/snes.h
index a1aae9734..8c8329065 100644
--- a/src/engine/platform/snes.h
+++ b/src/engine/platform/snes.h
@@ -69,7 +69,7 @@ class DivPlatformSNES: public DivDispatch {
   bool writeEcho;
   bool writeDryVol;
   bool echoOn;
-  bool interpolationOn;
+  bool interpolationOff;
 
   bool initEchoOn;
   signed char initEchoVolL;
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 6e2b0f7ca..854caccfd 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -1969,7 +1969,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
       echoFilter[6]=flags.getInt("echoFilter6",0);
       echoFilter[7]=flags.getInt("echoFilter7",0);
 
-      bool interpolationOn=flags.getBool("interpolationOn",true);
+      bool interpolationOff=flags.getBool("interpolationOff",false);
 
       ImGui::Text(_("Volume scale:"));
       if (CWSliderInt(_("Left##VolScaleL"),&vsL,0,127)) {
@@ -2086,7 +2086,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
       ImGui::Text(_("sum: %d"),filterSum);
       ImGui::PopStyleColor();
 
-      if (ImGui::Checkbox(_("Gaussian interpolation"),&interpolationOn)) {
+      if (ImGui::Checkbox(_("Disable Gaussian interpolation"),&interpolationOff)) {
         altered=true;
       }
 
@@ -2108,7 +2108,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
           flags.set("echoFilter6",echoFilter[6]);
           flags.set("echoFilter7",echoFilter[7]);
           flags.set("echoMask",echoMask);
-          flags.set("interpolationOn",interpolationOn);
+          flags.set("interpolationOff",interpolationOff);
         });
       }