diff --git a/ac/fpm_build.m4 b/ac/fpm_build.m4
index e43df95..46562a3 100644
--- a/ac/fpm_build.m4
+++ b/ac/fpm_build.m4
@@ -24,7 +24,7 @@ AC_DEFUN([AC_FPM_BUILD_SAPI],
 	PHP_SUBST(SAPI_EXTRA_LIBS)
 	
     dnl Set install target and select SAPI
-	INSTALL_IT=""
+	INSTALL_IT=":"
 
     PHP_SELECT_SAPI(fpm, program, $PHP_FPM_SAPI_FILES $PHP_FPM_CORE_FILES $PHP_FPM_TRACE_FILES, $PHP_FPM_CFLAGS, '$(SAPI_FPM_PATH)')