diff --git a/src/build/Common.gmake b/src/build/Common.gmake
index fa07173eafdc6ff4486530a3f51ad8040745b042..2074413dcd8086e14aff1dc5b9bd0732b783ccfb 100644
--- a/src/build/Common.gmake
+++ b/src/build/Common.gmake
@@ -296,7 +296,11 @@ OFILE		:= .o
 ifeq ($(os),win32)
  EXEFILE		:= .exe
 else
- EXEFILE		:=
+ ifeq ($(os),emscripten)
+  EXEFILE		:= .html
+ else
+  EXEFILE		:=
+ endif
 endif
 SOFILE		:= .so
 LIBFILE		:= .a