diff --git a/src/redismodule.h b/src/redismodule.h
index d390263b2..98939e93c 100644
--- a/src/redismodule.h
+++ b/src/redismodule.h
@@ -476,7 +476,7 @@ int REDISMODULE_API_FUNC(RedisModule_ReplyWithEmptyString)(RedisModuleCtx *ctx);
 int REDISMODULE_API_FUNC(RedisModule_ReplyWithVerbatimString)(RedisModuleCtx *ctx, const char *buf, size_t len);
 int REDISMODULE_API_FUNC(RedisModule_ReplyWithNull)(RedisModuleCtx *ctx);
 int REDISMODULE_API_FUNC(RedisModule_ReplyWithDouble)(RedisModuleCtx *ctx, double d);
-int REDISMODULE_API_FUNC(RedisModule_ReplyWithLongDouble)(RedisModuleCtx *ctx, double d);
+int REDISMODULE_API_FUNC(RedisModule_ReplyWithLongDouble)(RedisModuleCtx *ctx, long double d);
 int REDISMODULE_API_FUNC(RedisModule_ReplyWithCallReply)(RedisModuleCtx *ctx, RedisModuleCallReply *reply);
 int REDISMODULE_API_FUNC(RedisModule_StringToLongLong)(const RedisModuleString *str, long long *ll);
 int REDISMODULE_API_FUNC(RedisModule_StringToDouble)(const RedisModuleString *str, double *d);
diff --git a/tests/modules/misc.c b/tests/modules/misc.c
index fd892f52c..52a4c4d41 100644
--- a/tests/modules/misc.c
+++ b/tests/modules/misc.c
@@ -40,6 +40,43 @@ int test_call_info(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
     return REDISMODULE_OK;
 }
 
+int test_ld_conv(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
+    long double ld = 0.00000000000000001L;
+    const char *ldstr = "0.00000000000000001";
+    RedisModuleString *s1 = RedisModule_CreateStringFromLongDouble(ctx, ld, 1);
+    RedisModuleString *s2 =
+        RedisModule_CreateString(ctx, ldstr, strlen(ldstr));
+    if (RedisModule_StringCompare(s1, s2) != 0) {
+        char err[4096];
+        snprintf(err, 4096,
+            "Failed to convert long double to string ('%s' != '%s')",
+            RedisModule_StringPtrLen(s1, NULL),
+            RedisModule_StringPtrLen(s2, NULL));
+        RedisModule_ReplyWithError(ctx, err);
+        goto final;
+    }
+    long double ld2 = 0;
+    if (RedisModule_StringToLongDouble(s2, &ld2) == REDISMODULE_ERR) {
+        RedisModule_ReplyWithError(ctx,
+            "Failed to convert string to long double");
+        goto final;
+    }
+    if (ld2 != ld) {
+        char err[4096];
+        snprintf(err, 4096,
+            "Failed to convert string to long double (%.40Lf != %.40Lf)",
+            ld2,
+            ld);
+        RedisModule_ReplyWithError(ctx, err);
+        goto final;
+    }
+    RedisModule_ReplyWithLongDouble(ctx, ld2);
+final:
+    RedisModule_FreeString(ctx, s1);
+    RedisModule_FreeString(ctx, s2);
+    return REDISMODULE_OK;
+}
+
 int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
     REDISMODULE_NOT_USED(argv);
     REDISMODULE_NOT_USED(argc);
@@ -50,6 +87,7 @@ int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
         return REDISMODULE_ERR;
     if (RedisModule_CreateCommand(ctx,"test.call_info", test_call_info,"",0,0,0) == REDISMODULE_ERR)
         return REDISMODULE_ERR;
-
+    if (RedisModule_CreateCommand(ctx,"test.ld_conversion", test_ld_conv, "",0,0,0) == REDISMODULE_ERR)
+        return REDISMODULE_ERR;
     return REDISMODULE_OK;
 }
diff --git a/tests/unit/moduleapi/misc.tcl b/tests/unit/moduleapi/misc.tcl
index d392aeab0..21529747b 100644
--- a/tests/unit/moduleapi/misc.tcl
+++ b/tests/unit/moduleapi/misc.tcl
@@ -16,4 +16,9 @@ start_server {tags {"modules"}} {
         assert { [string match "*cmdstat_module*" $info] }
     }
 
+    test {test long double conversions} {
+        set ld [r test.ld_conversion]
+        assert {[string match $ld "0.00000000000000001"]}
+    }
+
 }