diff --git a/spectrum_manager/src/mongoose.h b/spectrum_manager/src/mongoose.h
index e5ce18007717e0f1c99d82b22679159b32c3a65e..8f20bb1337a82c9dc50ffab037810d3a0c2908cd 100644
--- a/spectrum_manager/src/mongoose.h
+++ b/spectrum_manager/src/mongoose.h
@@ -644,6 +644,7 @@ int json_emit_va(char *buf, int buf_len, const char *fmt, va_list);
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
 #include <openssl/ssl.h>
+#include <openssl/err.h>
 #else
 typedef void *SSL;
 typedef void *SSL_CTX;