diff --git a/Source/effects.cpp b/Source/effects.cpp
index 4fff300bb..7d2f7bf32 100644
--- a/Source/effects.cpp
+++ b/Source/effects.cpp
@@ -70,6 +70,7 @@ TSFX sgSFX[] = {
 /*IS_FROCK*/      { sfx_MISC,                  "sfx\\items\\fliprock.wav",    nullptr },
 /*IS_FSCRL*/      { sfx_MISC,                  "sfx\\items\\flipscrl.wav",    nullptr },
 /*IS_FSHLD*/      { sfx_MISC,                  "sfx\\items\\flipshld.wav",    nullptr },
+/*IS_FSIGN*/      { sfx_MISC,                  "sfx\\items\\flipsign.wav",    nullptr },
 /*IS_FSTAF*/      { sfx_MISC,                  "sfx\\items\\flipstaf.wav",    nullptr },
 /*IS_FSWOR*/      { sfx_MISC,                  "sfx\\items\\flipswor.wav",    nullptr },
 /*IS_GOLD*/       { sfx_MISC,                  "sfx\\items\\gold.wav",        nullptr },
diff --git a/Source/effects.h b/Source/effects.h
index 4cc81fc14..d1ba35b62 100644
--- a/Source/effects.h
+++ b/Source/effects.h
@@ -157,6 +157,7 @@ enum _sfx_id : int16_t {
 	IS_FROCK,
 	IS_FSCRL,
 	IS_FSHLD,
+	IS_FSIGN,
 	IS_FSTAF,
 	IS_FSWOR,
 	IS_GOLD,
diff --git a/Source/items.cpp b/Source/items.cpp
index 498363056..74ce6e821 100644
--- a/Source/items.cpp
+++ b/Source/items.cpp
@@ -305,7 +305,7 @@ _sfx_id ItemDropSnds[] = {
 	IS_FBODY,
 	IS_FBODY,
 	IS_FMUSH,
-	IS_ISIGN,
+	IS_FSIGN,
 	IS_FBLST,
 	IS_FANVL,
 	IS_FSTAF,