diff --git a/modemm17/Correlator.h b/modemm17/Correlator.h
index 6f81a1339..54ba44c6b 100644
--- a/modemm17/Correlator.h
+++ b/modemm17/Correlator.h
@@ -8,6 +8,7 @@
 #include <algorithm>
 #include <array>
 #include <cstdint>
+#include <cmath>
 #include <cstddef>
 #include <type_traits>
 #include <tuple>
diff --git a/plugins/channelrx/demoddatv/datvdemodsink.cpp b/plugins/channelrx/demoddatv/datvdemodsink.cpp
index 5847547bd..bb693d7c8 100644
--- a/plugins/channelrx/demoddatv/datvdemodsink.cpp
+++ b/plugins/channelrx/demoddatv/datvdemodsink.cpp
@@ -397,9 +397,11 @@ void DATVDemodSink::CleanUpDATVFramework()
         delete (leansdr::s2_fecdec<bool, leansdr::hard_sb>*) r_fecdec;
     }
 
+#if 0
     if (r_fecdecsoft != nullptr) {
         delete (leansdr::s2_fecdec_soft<leansdr::llr_t,leansdr::llr_sb>*) r_fecdecsoft;
     }
+#endif
 
     if (r_fecdechelper != nullptr) {
         delete (leansdr::s2_fecdec_helper<leansdr::llr_t,leansdr::llr_sb>*) r_fecdechelper;
diff --git a/plugins/channelrx/demoddatv/ldpctool/layered_decoder.h b/plugins/channelrx/demoddatv/ldpctool/layered_decoder.h
index be6e7b09d..95ce3fc89 100644
--- a/plugins/channelrx/demoddatv/ldpctool/layered_decoder.h
+++ b/plugins/channelrx/demoddatv/ldpctool/layered_decoder.h
@@ -18,17 +18,22 @@ namespace ldpctool {
 class LDPCUtil
 {
 public:
-#ifndef _MSC_VER
+#if defined(__APPLE__)
+    // Recent versions of MacOS support aligned_alloc, but Mojave doesn't
     static void *aligned_malloc(size_t alignment, size_t size)
     {
-        return aligned_alloc(alignment, size);
+        void *p = nullptr;
+
+        posix_memalign(&p, alignment, size);
+
+        return p;
     }
 
     static void aligned_free(void *mem)
     {
         free(mem);
     }
-#else
+#elif defined(_MSC_VER)
     static void *aligned_malloc(size_t alignment, size_t size)
     {
         return _aligned_malloc(size, alignment);
@@ -38,6 +43,16 @@ public:
     {
         _aligned_free(mem);
     }
+#else
+    static void *aligned_malloc(size_t alignment, size_t size)
+    {
+        return aligned_alloc(alignment, size);
+    }
+
+    static void aligned_free(void *mem)
+    {
+        free(mem);
+    }
 #endif
 };
 
diff --git a/plugins/channelrx/demoddatv/leansdr/dvbs2.h b/plugins/channelrx/demoddatv/leansdr/dvbs2.h
index 6aed0bfc2..8c6541f74 100644
--- a/plugins/channelrx/demoddatv/leansdr/dvbs2.h
+++ b/plugins/channelrx/demoddatv/leansdr/dvbs2.h
@@ -3046,6 +3046,8 @@ struct s2_fecdec : runnable
     pipewriter<int> *bitcount, *errcount;
 }; // s2_fecdec
 
+#ifdef LINUX
+
 // Soft LDPC decoder
 // Internally implemented LDPC tool. Replaces external LDPC decoder
 
@@ -3195,6 +3197,8 @@ private:
     s2_bbscrambling bbscrambling;
 }; // s2_fecdec_soft
 
+#endif
+
 // External LDPC decoder
 // Spawns a user-specified command, FEC frames on stdin/stdout.
 template <typename T, int _SIZE>